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03_Day_Booleans_operators_date/03_day_starter/scripts/main.js

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03_Day_Booleans_operators_date/03_day_starter/scripts/main.js
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// this is your main.js script
// this is your main.js script
//1.Declare firstName, lastName, country, city, age, isMarried, year variable and assign value to it and use the typeof operator to check different data types.
let firtsName = 'Jose'
typeof firtsName
'string'
let age = 32
'number'
typeof age
'boolean'
//2.Check if type of '10' is equal to 10
const type = '10'===10
//3.Check if parseInt('9.8') is equal to 10
const parse = parseInt('9.8')
parse===10
//4.Boolean value is either true or false.
//i.Write three JavaScript statement which provide truthy value.
let white = true
white ? console.log('is white'): console.log('is not white')
let monday = true
monday? console.log('week start'): console.log('weekend')
let road = true
road ? console.log('road is open'): console.log('road is close')
//ii.Write three JavaScript statement which provide falsy value.
let door= false
door ? console.log(`door is close`):console.log(`door is open`)
let noche = false
noche ? console.log('es de dia'): console.log('es noche')
//5.Figure out the result of the following comparison expression first without using console.log(). After you decide the result confirm it using console.log()
//i. 4 > 3 true
//ii. 4 >= 3 true
//iii 4 < 3 true
//v. 4 <= 3 false
//iv. 4 == 4 true
//vi. 4 === 4 true
//vii. 4 != 4 false
//viii. 4 !== 4 false
//ix. 4 != '4' true
//x. 4 == '4' true
//xi. 4 === '4' false
//xii. Find the length of python and jargon and make a falsy comparison statement.
console.log('wordJargon'.length!=='wordPython'.length)
//6.Figure out the result of the following expressions first without using console.log(). After you decide the result confirm it by using console.log()
//i. 4 > 3 && 10 < 12
//ii. 4 > 3 && 10 > 12
//iii 4 > 3 || 10 < 12
//v. 4 > 3 || 10 > 12
//iv. !(4 > 3)
//vi. !(4 < 3)
//vii. !(false)
//viii. !(4 > 3 && 10 < 12)
//ix. !(4 > 3 && 10 > 12)
//x. !(4 === '4')
//xi. There is no 'on' in both dragon and python
//7.Use the Date object to do the following activities
//i.What is the year today?
const now = new Date()
const year = now.getFullYear()
//ii.What is the month today as a number?
const month = now.getMonth()+1
//iii.What is the date today?
const date = now.getDate()
//iv. What is the day today as a number?
const day = now.getDay()
//v. What is the hours now?
const hours = now.getHours()
//vi. What is the minutes now?
console.log(now.getMinutes())
//vii. Find out the numbers of seconds elapsed from January 1, 1970 to now.
const allseconds = Date.now()
//Exercises: Level 2
//1. Write a script that prompt the user to enter base and height of the triangle and calculate an area of a triangle (area = 0.5 x b x h).
let base = parseInt(prompt('base', 'enter base'))
let height = parseInt(prompt('Height','Enter height'))
let areaTriangle = base * height * 0.5
console.log(areaTriangle)
//2. Write a script that prompt the user to enter side a, side b, and side c of the triangle and and calculate the perimeter of triangle (perimeter = a + b + c)
let sideA = parseInt(prompt('Side a', 'Enter side a'))
let sideB = parseInt(prompt('Side b', 'Enter side b'))
let sideC = parseInt(prompt('Side c', 'Enter side c'))
let perimeter = sideA + sideB + sideC
console.log(perimeter)
//3.Get length and width using prompt and calculate an area of rectangle (area = length x width and the perimeter of rectangle (perimeter = 2 x (length + width))
let length = parseInt(prompt('length', 'Enter length'))
let width = parseInt(prompt('Height','Enter width'))
let areaRectangle = length * width
console.log(areaTriangle)
let perimeterRectangle = 2 * (length + width)
console.log(perimeterRectangle)
//4. Get radius using prompt and calculate the area of a circle (area = pi x r x r) and circumference of a circle(c = 2 x pi x r) where pi = 3.14.
const PI = 3.14
let radius = parseInt(prompt('Radius', 'Enter radius'))
let area = PI * (radius**2)
console.log(area)
let circunference = 2 * PI * radius
console.log(circunference)
//5.Calculate the slope, x-intercept and y-intercept of y = 2x -2
let y1 = 2;
let y2 = -2;
let x1 = 2;
let x2 = -2;
console.log(`Slope is${(y2 - y1) / (x1 - x2)}`); //-1
//6.Slope is m = (y2-y1)/(x2-x1). Find the slope between point (2, 2) and point(6,10)
let slope = console.log(`Slope is${(2, 2) / (6, 10)}`); // 0.2
//7.Compare the slope of above two questions.
//8.Calculate the value of y (y = x2 + 6x + 9). Try to use different x values and figure out at what x value y is 0.
let xs1 = 2
let xs2 = 6
let y = xs1 + xs2 + 9
console.log(y)
//9.Write a script that prompt a user to enter hours and rate per hour. Calculate pay of the person?
/*Enter hours: 40
Enter rate per hour: 28
Your weekly earning is 1120*/
let payHours = parseInt(prompt('Hours', 'Enter hours worked'))
let ratePerHour = parseInt(prompt('Rate per hour', 'Enter rate per hour $'))
let earnings = payHours * ratePerHour
console.log(earnings)
//10.If the length of your name is greater than 7 say, your name is long else say your name is short.
let names = 'Jose'
names.length > 7 ? console.log('your name is long'): console.log('name is short')
function namesLength(name){
name= prompt('enter name'), name.length > 7 ? console.log('your name is long'): console.log('name is short');}
//11.Compare your first name length and your family name length and you should get this output.
let firstName = 'Jose'
let lastName = 'linardo'
let compareNames = firstName.length > lastName.length ? console.log('Your first name ' + firstName + 'is longer than your family name ' + lastName): console.log('your first name ' + firstName + 'is smaller than your family name ' + lastName)
//12. Declare two variables myAge and yourAge and assign them initial values and myAge and yourAge.
let myAge = parseInt(prompt('my age'))
let yourAge = parseInt(prompt('your age'))
let compareAges = myAge > yourAge ? console.log(`I am ${(myAge-yourAge)}years older than you.`): console.log(`I am ${(yourAge-myAge)} years young than you`)
//13.Using prompt get the year the user was born and if the user is 18 or above allow the user to drive if not tell the user to wait a certain amount of years.
/*Enter birth year: 1995
You are 25. You are old enough to drive
Enter birth year: 2005
You are 15. You will be allowed to drive after 3 years.*/
let birthYear = prompt('Enter your Birth year')
let minAge = 18
if(birthYear.length===4){
let age_ = now.getFullYear()-parseInt(birthYear)
const ageToDrive = age_< 18? console.log(`You are. ${age_} You will be allowed to drive after ${(minAge-age_)} years`): console.log(`You are ${age_} You are old enough to drive`)}
else{ alert('Please enter your complete birth year.It should not be less than 4 numbers' )
}
//14.Write a script that prompt the user to enter number of years. Calculate the number of seconds a person can live. Assume some one lives just hundred years
/*Enter number of years you live: 100
You lived 3153600000 seconds.*/
let numberOfSeconds = parseInt(prompt('Enter years'))*(60*60 *24*365)
console.log(numberOfSeconds)
//15.Create a human readable time format using the Date time object
// i. YYYY-MM-DD HH:mm
const now_= new Date()
let day_ = `${(now_.getDate())}`.padStart(2,'0');
let month_ = `${(now_.getMonth()+1)}`.padStart(2,'0');
let year_ = now_.getFullYear();
const date_ = now_.getDate();
let minutes = now_.getMinutes()
const hours_ = now_.getHours()
console.log(`${year_}/${month_}/${day_}/${hours_}:${minutes}`)
//ii. YYYY-MM-DD HH:mm
console.log(`${year_}/${month_}/${day_}/${hours_}:${minutes}`)
//iii. DD/MM/YYYY HH:mm*/
console.log(`${day_}/${month_}/${year_}/${hours_}:${minutes}`)
//Exercises: Level 3
/*1.Create a human readable time format using the Date time object. The hour and the minute should be all the time two digits(7 hours should be 07 and 5 minutes should be 05 )
padStart(2,'0')
i.YYY-MM-DD HH:mm eg. 20120-01-02 07:05
var numero = parseInt(prompt("introduzca un número"));
while (numero >= 10) {
numero = numero.toString().split('').map(x => parseInt(x) )
.reduce( (x, y) => x + y);
}
alert(numero);*/

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04_Day_Conditionals/04_day_starter/scripts/main.js
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// this is your main.js script
alert('Open the browser console whenever you work on JavaScript')
alert('Open the browser console whenever you work on JavaScript')
//Exercises: Level 1
//1.Get user input using prompt(“Enter your age:”). If user is 18 or older , give feedback:'You are old enough to drive' but if not 18 give another feedback stating to wait for the number of years he needs to turn 18.
let yourAge = prompt('Enter you age')
if(yourAge >= 18){
console.log('you are old enough to drive')
}else {
console.log(`You are left whih ${(18 - yourAge )} to drive`)
}
//2.Compare the values of myAge and yourAge using if … else. Based on the comparison and log the result to console stating who is older (me or you). Use prompt(“Enter your age:”) to get the age as input.
let myAge = prompt('Enter my age')
let yourAge_ = prompt('Enter your age')
if(myAge<yourAge_){
console.log(`You are ${yourAge_ - myAge} years older than me.`)}
else if(myAge>yourAge_){
console.log(`I am ${myAge - yourAge_} years older than you`)
}else{
console.log('we are same age')
}
//3.If a is greater than b return 'a is greater than b' else 'a is less than b'. Try to implement it in to ways
let a = 4
let b = 3
if(a>b){
console.log(`${a} is greater than ${b}`)
}else if(a<b){
console.log(`${a} is less than ${b}`)
}else{
console.log(`${a} is equal ${b}`)
}
a > b ? console.log('a is greater than b'):a<b? console.log('a is less than b'): console.log('a is equal b');
//4.Even numbers are divisible by 2 and the remainder is zero. How do you check, if a number is even or not using JavaScript?
let num = prompt('Enter number')
if(num % 2 === 0){
console.log(`${num}is an even number`)
}else{
console.log(`${num} is an odd number`)
}
//Exercises: Level 2
/*1.Write a code which can give grades to students according to theirs scores:
80-100, A
70-89, B
60-69, C
50-59, D
0-49, F
*/
let scores = prompt('Enter score')
if( scores<= 100 && scores>=80){
console.log(`your score es A`)
}else if(scores>=70 && scores<=89){
console.log('your score is B')
}else if(scores >=60 && scores<=69){
console.log('your score is C')
}else if(scores >=50 && scores<=59){
console.log('your score is D')
}else if(scores >=0 && scores<=49){
console.log('Your score es F')
}else{
console.log('Max score is 100')
}
/*2.Check if the season is Autumn, Winter, Spring or Summer. If the user input is :
° September, October or November, the season is Autumn.
° December, January or February, the season is Winter.
° March, April or May, the season is Spring
° June, July or August, the season is Summer*/
let season = prompt('Enter month')
season = season.toLowerCase()
if(season==='september' || season === 'october'|| season==='november'){
console.log('Season is Autumn')
}else if(season==='december'|| season==='january'|| season==='february'){
console.log('the season is Spring')
}else{
console.log('the season is Summer')
}
//3.Check if a day is weekend day or a working day. Your script will take day as an input.
let daysOfWeek = ['monday', 'tuesday', 'wedsnesday','thursday', 'friday', 'saturday', 'sunday'];
let input = prompt('Enter day').toLowerCase();
input === daysOfWeek[5] || input === daysOfWeek[6]? console.log(`${input[0].toUpperCase() + input.slice(1)} is a weekend`):
input === daysOfWeek[0] || input === daysOfWeek[1] || input === daysOfWeek[2] || input === input[3] || input === daysOfWeek[4]? console.log(`${input[0].toUpperCase() + input.slice(1)} is a day working`):console.log(`${input} no es un dia de la semana`)
//Exercises: Level 3
//1. Write a program which tells the number of days in a month.
const months = {"january": 1, "february": 2, "march":3, "april": 4, "may": 5, "june": 6, "july": 7, "august": 8, "september": 9, "october": 10, "november": 11, "december": 12 };
let daysInMonth = new Date(2022, months[prompt('Enter Month').toLowerCase], 0).getDate();
console.log(daysInMonth)

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