Merge 9c955ff63c into 26b7c59eec
Belaid DALI OMAR
3 weeks ago
committed by
GitHub
commit
fab388a294
@ -1 +1,155 @@
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// this is your main.js script
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// Exercise 01
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// Declare a variable named challenge and assign it an initial value
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let challenge = '30 Days Of JavaScript';
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// Print the string on the browser console
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console.log(challenge);
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// Print the length of the string
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console.log(challenge.length);
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// Change all characters to capital letters
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console.log(challenge.toUpperCase());
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// Change all characters to lowercase letters
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console.log(challenge.toLowerCase());
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// Slice out the first word of the string
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console.log(challenge.substr(0, 2)); // Assuming you want the first word "30"
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// Slice out the phrase "Days Of JavaScript"
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console.log(challenge.substring(3)); // Assuming you want to exclude the initial "30 "
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// Check if the string contains the word "Script"
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console.log(challenge.includes('Script'));
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// Split the string into an array
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console.log(challenge.split());
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// Split the string at the space
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console.log(challenge.split(' '));
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// Split the string at the comma and change it to an array
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let companies = 'Facebook, Google, Microsoft, Apple, IBM, Oracle, Amazon';
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console.log(companies.split(', '));
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// Change "30 Days Of JavaScript" to "30 Days Of Python"
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console.log(challenge.replace('JavaScript', 'Python'));
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// Character at index 15
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console.log(challenge.charAt(15));
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// Character code of J
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console.log(challenge.charCodeAt(challenge.indexOf('J')));
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// Position of first occurrence of 'a'
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console.log(challenge.indexOf('a'));
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// Position of last occurrence of 'a'
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console.log(challenge.lastIndexOf('a'));
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// Position of first occurrence of 'because' in a sentence
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let sentence = 'You cannot end a sentence with because because because is a conjunction';
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console.log(sentence.indexOf('because'));
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// Position of last occurrence of 'because' in a sentence
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console.log(sentence.lastIndexOf('because'));
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// Position of first occurrence of 'because' using search
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console.log(sentence.search('because'));
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// Remove trailing whitespace
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console.log(challenge.trim());
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// Check if it starts with '30 Days Of JavaScript'
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console.log(challenge.startsWith('30 Days Of JavaScript'));
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// Check if it ends with '30 Days Of JavaScript'
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console.log(challenge.endsWith('30 Days Of JavaScript'));
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// Find all occurrences of 'a' using match
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console.log(challenge.match(/a/g));
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// Concatenate strings
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console.log('30 Days of '.concat('JavaScript'));
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// Repeat the string
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console.log(challenge.repeat(2));
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//Excercise JavaScript level 02
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// Exercise 1
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console.log("The quote 'There is no exercise better for the heart than reaching down and lifting people up.' by John Holmes teaches us to help one another.");
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// Exercise 2
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console.log("\"Love is not patronizing and charity isn't about pity, it is about love. Charity and love are the same -- with charity you give love, so don't just give money but reach out your hand instead.\"");
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// Exercise 3
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if (typeof '10' !== 'number') {
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'10' = parseInt('10');
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}
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// Exercise 4
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if (parseFloat('9.8') !== 10) {
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'9.8' = parseFloat('10');
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}
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// Exercise 5
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const python = 'python';
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const jargon = 'jargon';
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console.log('on' in python && 'on' in jargon);
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// Exercise 6
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const sentence = 'I hope this course is not full of jargon.';
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console.log(sentence.includes('jargon'));
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// Exercise 7
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const randomNumber1 = Math.floor(Math.random() * 101);
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console.log(randomNumber1);
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// Exercise 8
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const randomNumber2 = Math.floor(Math.random() * 51) + 50;
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console.log(randomNumber2);
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// Exercise 9
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const randomNumber3 = Math.floor(Math.random() * 256);
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console.log(randomNumber3);
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// Exercise 10
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const jsString = 'JavaScript';
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const randomIndex = Math.floor(Math.random() * jsString.length);
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console.log(jsString[randomIndex]);
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// Exercise 11
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console.log("1 1 1 1 1");
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console.log("2 1 2 4 8");
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console.log("3 1 3 9 27");
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console.log("4 1 4 16 64");
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console.log("5 1 5 25 125");
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// Exercise 12
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const sentence2 = 'You cannot end a sentence with because because because is a conjunction';
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const extractedPhrase = sentence2.substr(30, 23);
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console.log(extractedPhrase);
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//Exercise level 03
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const sentence1 = 'Love is the best thing in this world. Some found their love and some are still looking for their love.';
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const countLove1 = (sentence1.match(/love/gi) || []).length;
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console.log(countLove1); // Output: 3
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//
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const sentence2 = 'You cannot end a sentence with because because because is a conjunction';
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const countBecause = (sentence2.match(/\bbecause\b/gi) || []).length;
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console.log(countBecause); // Output: 3
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//
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const text4 = 'He earns 5000 euro from salary per month, 10000 euro annual bonus, 15000 euro online courses per month.';
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// Extract numbers using regular expression and sum them up
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const numbers = text4.match(/\d+/g).map(Number);
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const totalAnnualIncome = numbers.reduce((total, num) => total + num, 0);
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console.log(totalAnnualIncome); // Output: 30000
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@ -1 +1,280 @@
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// this is your main.js script
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//exercice level 1
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//ex 01
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let firstName = 'Belaid';
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let lastName = 'DALI OMAR';
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let country = 'Algeria';
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let city = 'Tizi Ouzou';
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let age = 30;
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let isMarried = false;
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let year = 1993;
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console.log(typeof(firstName)); //string
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console.log(typeof(lastName)); //string
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console.log(typeof(country)); //string
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console.log(typeof(city)); //string
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console.log(typeof(age)); //number
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console.log(typeof(isMarried)); //boolean
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console.log(typeof(year)); //number
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//exo 02
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console.log('10' == 10); //true
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//exo 03
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let l = parseInt('9.8');
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console.log(a == 10); //False
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//exo 04
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//Truthy values:
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let truthyValue = 42;
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let truthyString = "Hello, world!";
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let truthyArray = [1, 2, 3];
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// Falsy values:
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let falsyValue = 0;
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let falsyString = "";
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let falsyNull = null;
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//exo 05
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console.log(4>3); //true
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console.log(4>=3); //true
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console.log(4<3); //false
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console.log(4 == 4); //true
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console.log(4 === 4); //true
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console.log(4 != 4); //False
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console.log(4 !== 4); //false
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console.log(4 != '4'); //false
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console.log(4 == '4'); //true
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console.log(4 === '4'); //false
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const pythonLength = "python".length;
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const jargonLength = "jargon".length;
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const isFalsyComparison = pythonLength === jargonLength ? "Falsy" : "Not Falsy";
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console.log(isFalsyComparison);
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//exo 06
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console.log(4 > 3 && 10 < 12); //true
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console.log(4 > 3 && 10 > 12); //false
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console.log(4 > 3 || 10 < 12); //true
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console.log(4 > 3 || 10 > 12); //true
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console.log(!(4 > 3)); //false
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console.log(!(4 < 3)); //true
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console.log(!(false)); //true
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console.log(!(4 > 3 && 10 < 12)); //false
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console.log(!(4 > 3 && 10 > 12)); //true
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console.log(!(4 === '4')); //true
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const str1 = 'python';
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const str2 = 'dragon';
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const isFalsyVal = str1.includes('on') || str2.includes('on') ? true : false;
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console.log(isFalsyVal); //true
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//exo 07
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const time = new Date();
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console.log(time); //Wed Aug 23 2023 10:39:33 GMT+0100 (Central European Standard Time)
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console.log(time.getFullYear()); // 2023
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console.log(time.getMonth() + 1); // 7
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console.log(time.getDate()); // 23
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console.log(time.getDay()); // 3
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console.log(time.getHours()); // 10
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console.log(time.getMinutes()); // 39
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console.log(time.getTime()); // 1692783573531 seconds since January 1, 1970 00:00:00 GMT to 10:39:33 GMT
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//Exercice level 02
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//exo 01
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const base = parseFloat(prompt('Enter base:'));
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const h = parseFloat(prompt('Enter Height:'));
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let area = 0.5*base*h;
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console.log(`the area is ${area}`); // 100
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// exo 02
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let a = parseFloat(prompt('Enter side a:'));
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let b = parseFloat(prompt('Enter side b:'));
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let c = parseFloat(prompt('Enter side c:'));
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let p = a+b+c;
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console.log(`the perimeter is ${p}`); //12
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//exo 03
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let length = parseFloat(prompt('Enter L: '));
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let width = parseFloat(prompt('Enter W: '));
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let areas = length * width;
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let perimeter = 2*(length+width);
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console.log(`the perimeter is ${perimeter}`); //
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console.log(`the area is ${areas}`); //
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//exo 04
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let r = parseFloat(prompt('Enter L: '));
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const Pi = 3.14;
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let ar = r * r * Pi;
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let per= 2*Pi*r;
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console.log(`the perimeter is ${per}`); //
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console.log(`the area is ${ar}`); //
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//ex 05
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// Equation: y = 2x - 2
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// Slope (m) is the coefficient of x
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const slope = 2;
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// x-intercept: When y = 0
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// 0 = 2x - 2
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// 2x = 2
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// x = 1
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const xIntercept = 1;
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// y-intercept: When x = 0
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const yIntercept = -2;
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console.log(`Slope (m): ${slope}`);
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console.log(`x-intercept: (${xIntercept}, 0)`);//(1,0)
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console.log(`y-intercept: (0, ${yIntercept})`);//(0,-2)
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//EXO 06
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// Points
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const x1 = 2;
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const y1 = 2;
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const x2 = 6;
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const y2 = 10;
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// Calculate the slope
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const slopes = (y2 - y1) / (x2 - x1);
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console.log(`The slope between (${x1}, ${y1}) and (${x2}, ${y2}) is ${slopes}`);//2
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//exo 07
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// Equation: y = 2x - 2
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// Given points
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const x1 = 2;
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const y1 = 2;
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const x2 = 6;
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const y2 = 10;
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// Calculate the slope for the equation y = 2x - 2
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const equationSlope = 2;
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// Calculate the slope between the two points
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const pointSlope = (y2 - y1) / (x2 - x1);
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// Compare the slopes using ternary operator
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const comparisonResult = equationSlope === pointSlope ? "Equal" : "Not Equal";
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console.log(`Slope of y = 2x - 2: ${equationSlope}`);//Slope of y = 2x -2: 2
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console.log(`Slope between (${x1}, ${y1}) and (${x2}, ${y2}): ${pointSlope}`);//slope between (2,2) and (6,10): 2
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console.log(`Comparison result: Slopes are ${comparisonResult}`);// comparison result: Slopes are Equal
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//Exo 08
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// Equation: y = x^2 + 6x + 9
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// Given equation coefficients
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const a = 1;
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const b = 6;
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const c = 9;
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// Calculate the discriminant
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const discriminant = Math.sqrt(b * b - 4 * a * c);
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// Calculate the two possible x values when y is 0
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const x1 = (-b + discriminant) / (2 * a);
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const x2 = (-b - discriminant) / (2 * a);
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console.log(`x1: ${x1}`);//-3
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console.log(`x2: ${x2}`);//-3
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//exo 09
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let hours = parseFloat(prompt('Enter Hour'));
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let rateHr = parseFloat(prompt('Enter rate per hour'));
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const salary = hours * rateHr;
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console.log(`Your weekly earning is ${salary}`);//Your weekly earning is 1120
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//exo 10
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const name = 'Belaid';
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let L = name.length;
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(L > 7)
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? console.log('my name is long')
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: console.log('my name is short')
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//my name is short
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//exo 11
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let firstName = 'Belaid';
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let lastName = 'DALI OMAR';
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(length.firstName > length.lastName)
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? console.log(`my first name, ${firstName} is longer than my family name, ${lastName}`)
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: console.log(`my last name, ${lastName} is longer than my first name, ${firstName}`)
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//my last name, DALI OMAR is longer than my first name, Belaid
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//exo 12
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let myAge = 30;
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let yourAge = 32;
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console.log(`you are ${yourAge - myAge} years older than me`);
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// you are 2 years older than me
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//exo 13
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let birthYear = parseInt(prompt('Enter your birth year'));
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let ages = 2023 - birthYear;
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(ages>18)
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? console.log(`you are ${ages}. You are old enough to drive`)
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: console.log(`you are ${ages}. You will not be allowed to drive`);
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//you are 29. You are old enough to drive
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//exo 14
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let yrs = parseInt(prompt('Enter number of years you live'));
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const live = new Date();
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console.log(`you lived ${live.getTime()} seconds`);
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//you lived 1692797539157 seconds
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//exo 15
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const now = new Date();
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const years = now.getFullYear(); // return year
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const month = now.getMonth() + 1; // return month(0 - 11)
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const date = now.getDate(); // return date (1 - 31)
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const Hours = now.getHours(); // return number (0 - 23)
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const minutes = now.getMinutes(); // return number (0 -59)
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console.log(`${years}-${month}-${date} ${Hours}:${minutes}`);
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//2023-8-23 14:38
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console.log(`${date}-${month}-${years} ${Hours}:${minutes}`);
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//23-8-2023 14:38
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console.log(`${date}/${month}/${years} ${Hours}:${minutes}`);
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// 23/8/2023 14:38
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//exercise level 3
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//exo 01
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const months = String(date.getMonth() + 1).padStart(2, '0');
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const day = String(date.getDate()).padStart(2, '0');
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const hourss = String(date.getHours()).padStart(2, '0');
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const Minutes = String(date.getMinutes()).padStart(2, '0');
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console.log(`${years}-${months}-${day} ${hourss}:${Minutes}`);
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@ -1,3 +1,139 @@
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// this is your main.js script
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alert('Open the browser console whenever you work on JavaScript')
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//Exo level 1
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//exo 01
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let age = prompt('Enter your age');
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if(age>=18){
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"you are old enough to drive";
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} else {
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`you are left with ${18-age} years to drive`;
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}
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//exo 02
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let myAge = prompt('Enter your age');
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const yourAge = 45;
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if(myAge>yourAge){
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`Um ${myAge-yourAge} years oder than you`;
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} else {
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`you are ${yourAge-myAge} years older than me`;
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}
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//exo 03
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let a = parseInt(prompt('Enter a number'));
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let b= parseInt(prompt('Enter another number'));
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(a>b) ? console.log('a is greater than b') : console.log('b is greater than a');
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//exo 04
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let c = parseInt(prompt('Enter a number'));
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if(c%2==0){
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console.log(`${c} is even`);
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} else {
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console.log(`${c} is odd`);
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}
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//exo level 2
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let score = parseInt(prompt('Give your score:'));
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let grade;
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switch (true) {
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case (score >= 80 && score <= 100):
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grade = "A";
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break;
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case (score >= 70 && score < 80):
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grade = "B";
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break;
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case (score >= 60 && score < 70):
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grade = "C";
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break;
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case (score >= 50 && score < 60):
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grade = "D";
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break;
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case (score >= 0 && score < 50):
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grade = "F";
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break;
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default:
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grade = "Failed";
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||||
}
|
||||
|
||||
console.log(`Your grade is ${grade}`);
|
||||
|
||||
//exo 02
|
||||
|
||||
let monthInput = prompt('Enter a month:');
|
||||
let month = monthInput.toLowerCase();
|
||||
let season;
|
||||
switch (true) {
|
||||
case month=="september" || month=="october" || month=="november" :
|
||||
season = "Autumn";
|
||||
break;
|
||||
case month=="decembre" || month=="january" || month=="february" :
|
||||
season = "Winter";
|
||||
break;
|
||||
case month=="march" || month=="april" || month=="may" :
|
||||
season = "Spring";
|
||||
break;
|
||||
case month=="june" || month=="july" || month=="august":
|
||||
season = "Summer";
|
||||
break;
|
||||
default :
|
||||
season = "";
|
||||
}
|
||||
|
||||
//exo 03
|
||||
|
||||
let dayInput = prompt("What is the day today?");
|
||||
let day = dayInput.toLowerCase();
|
||||
|
||||
if (day === "saturday" || day === "sunday") {
|
||||
console.log(`${day} is a weekend.`);
|
||||
} else if (day === "monday" || day === "tuesday" || day === "wednesday" || day === "thursday" || day === "friday") {
|
||||
console.log(`${day} is a working day.`);
|
||||
} else {
|
||||
console.log("Invalid day.");
|
||||
}
|
||||
|
||||
//exo level 3
|
||||
|
||||
//exo 01
|
||||
|
||||
let monthIn = prompt("Enter a month");
|
||||
let months = monthIn.toLowerCase();
|
||||
let days;
|
||||
|
||||
switch (months) {
|
||||
case "january":
|
||||
case "march":
|
||||
case "july":
|
||||
case "august":
|
||||
case "october":
|
||||
case "december":
|
||||
days = 31;
|
||||
break;
|
||||
case "april":
|
||||
case "june":
|
||||
case "september":
|
||||
case "november":
|
||||
days = 30;
|
||||
break;
|
||||
case "february":
|
||||
let yearInput = parseInt(prompt("Enter a year: "));
|
||||
let isLeapYear = (yearInput % 4 === 0 && yearInput % 100 !== 0) || (yearInput % 4 === 0);
|
||||
days = isLeapYear ? 29 : 28;
|
||||
break;
|
||||
default:
|
||||
console.error("Invalid month");
|
||||
break;
|
||||
}
|
||||
|
||||
if (days !== undefined) {
|
||||
|
||||
console.log(`${months} has ${days}`);
|
||||
}
|
||||
@ -0,0 +1,19 @@
|
||||
const webTechs = [
|
||||
'HTML', 'CSS', 'JavaScript', 'React', 'Node',
|
||||
'PHP', 'EastJS', 'SQL', 'SASS', 'AngolaJS'
|
||||
]
|
||||
|
||||
const isSass = webTechs.includes('SASS');
|
||||
if (isSass) {
|
||||
console.log('SASS is a CSS preprocessor');
|
||||
} else {
|
||||
webTechs.push('SASS');
|
||||
console.log(webTechs);
|
||||
}
|
||||
|
||||
//exo 6
|
||||
const frontEnd = ['HTML', 'CSS', 'JS', 'React', 'Redux']
|
||||
const backEnd = ['Node','Express', 'MongoDB']
|
||||
const fullStack = frontEnd.concat(backEnd);
|
||||
|
||||
console.log(fullStack);
|
||||
Loading…
Reference in new issue