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30-Days-Of-JavaScript
mirror of https://github.com/Asabeneh/30-Days-Of-JavaScript
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day 1

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pull/914/head
Doris Wiebe 3 years ago
parent 55d8e3dbc0
commit 165551480a
4 changed files with 116 additions and 29 deletions
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60
01_Day_Introduction/01_day_starter/datatypes.js
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// typeof operator, checks datatype of variables
console.log(typeof character);
console.log(typeof characterIQ);
console.log(typeof characterIsMarried);
console.log(typeof testOfUndefined);
console.log(typeof emptyValue);
// variables without values
let test1;
let test2;
let test3;
let test4;
console.log(test1, test2, test3, test4);
// variables with assigned values
const varWithValue = "assigned value";
let test = false;
console.log(test);
test = true;
const num = 100;
let operator;
console.log(varWithValue, test, num, operator);
// variables in multiple lines
let characterFirstName = "Penny";
let characterLastName = "Hofstadter";
let characterIsMarriedStatus = true;
let characterCountry = "USA";
let characterAgeOf = 22;
console.log(
characterFirstName,
characterLastName,
characterIsMarriedStatus,
characterCountry,
characterAgeOf
);
//variables in single line
let firstNameTest = "Max",
lastNameTest = "Mustermann",
isMarriedTest = false,
countryTest = "Musterland",
ageTest = null;
console.log(firstNameTest, lastNameTest, isMarriedTest, countryTest, ageTest);
// age variables with initial values
let myAge = 35;
let yourAge = 74;
console.log("I am " + myAge + " years old.");
console.log("You are " + yourAge + " years old.");

14
01_Day_Introduction/01_day_starter/helloworld.js
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console.log('Hello, World!') console.log("Hello, World!");
// comments
// single comment: comments can make code readable
// Welcome to 30DaysOfJavaScript
/*
multiline comment:
comments can make code readable,
easy to reuse and informative
*/

12
01_Day_Introduction/01_day_starter/index.html
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<!DOCTYPE html> <!DOCTYPE html>
<html lang="en"> <html lang="en">
<head>
<head>
<title>30DaysOfJavaScript</title> <title>30DaysOfJavaScript</title>
</head> </head>
<body> <body>
<h1>30DaysOfJavaScript:03 Day</h1> <h1>30DaysOfJavaScript:03 Day</h1>
<h2>Introduction</h2> <h2>Introduction</h2>
<button onclick="alert('Welcome to 30DaysOfJavaScript!');">Click Me</button> <button onclick="alert('Welcome to 30DaysOfJavaScript!');">Click Me</button>
@ -13,7 +12,6 @@
<script src="./introduction.js"></script> <script src="./introduction.js"></script>
<script src="./variable.js"></script> <script src="./variable.js"></script>
<script src="./main.js"></script> <script src="./main.js"></script>
<script src="./datatypes.js"></script>
</body> </body>
</html> </html>

41
01_Day_Introduction/01_day_starter/variable.js
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// Declaring different variables of different data types // Declaring different variables of different data types
let firstName = 'Asabeneh' // first name of a person let firstName = "Asabeneh"; // first name of a person
let lastName = 'Yetayeh' // last name of a person let lastName = "Yetayeh"; // last name of a person
let country = 'Finland' // country let country = "Finland"; // country
let city = 'Helsinki' // capital city let city = "Helsinki"; // capital city
let age = 100 // age in years let age = 100; // age in years
let isMarried = true let isMarried = true;
// Declaring variables with number values // Declaring variables with number values
const gravity = 9.81 // earth gravity in m/s2 const gravity = 9.81; // earth gravity in m/s2
const boilingPoint = 100 // water boiling point, temperature in oC const boilingPoint = 100; // water boiling point, temperature in oC
const PI = 3.14 // geometrical constant const PI = 3.14; // geometrical constant
// Variables can also be declaring in one line separated by comma // Variables can also be declaring in one line separated by comma
let name = 'Asabeneh', //name of a person let name = "Asabeneh", //name of a person
job = 'teacher', job = "teacher",
live = 'Finland' live = "Finland";
// my own variables
let character = "Sheldon Cooper";
console.log(character);
character = "Leonard Hofstadter";
console.log(character);
const characterIQ = 173;
console.log(characterIQ);
console.log(character, characterIQ);
const characterIsMarried = true;
let testOfUndefined;
let emptyValue = null;
console.log(characterIsMarried, testOfUndefined, emptyValue);

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