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sandeepEverestsandeepEverest
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‎js-practice/arrays.js‎

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// arrays are not type-specific in js
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// different data types can be stored in an array
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let a = [1,2,3,4] // valid
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// data can be accessed using the index of the element
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console.log(a[3]) // printing 4 on console
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a = [1,"sun",["a","b"],{"name":"js"}] //valid
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console.log(a[2][1]) // printing b on console
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a = [1,2,3,4]
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// Push - adding data in the end
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// Unshift - adding element in the beginning
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// Pop - removing element from the last
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// Shift - remove an element from the beginning
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a.push(5) // [1,2,3,4,5]
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a.unshift(0) // [0,1,2,3,4,5]
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a.pop() // [0,1,2,3,4]
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a.shift() // [1,2,3,4]
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a.sort() // will sort data in an array

‎js-practice/doWhile.js‎

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let i=1;
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while(i<5){
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// console.log(i)
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i++;
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}
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i=20;
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do{
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console.log("i value::"+i)
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i++;
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}
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while(i<1);

‎js-practice/forLoop.js‎

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for(let i=1;i<5;i++){
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// console.log(i)
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}
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let carDetails = {
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name:"i20",
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make:"2023",
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cost:"300000"
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}
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for(let key in carDetails){
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// console.log(key +"::"+carDetails[key])
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}
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let months = ["jan","feb","mar","apr"]
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for(let month in months){
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// console.log(months[month])
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}
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let numbers = [10,20,30,40]
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let total=0
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numbers.forEach(num=>{total+=num})
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console.log(total)

‎js-practice/ifElseIf.js‎

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let num1 = 20
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let num2 = 30
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console.log("num1::"+num1)
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console.log("num2::"+num2)
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if(num1<num2)
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console.log("num1 is less than num2")
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if(num1>num2)
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console.log("num1 is greater than num2")
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if(num1<num2){
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console.log("num1 is less than num2")
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}else if(num1>num2){
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console.log("num1 is greater than num2")
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}else if(num1==num2){
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console.log("num1 is equal to num2")
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}else{
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console.log("numbers cannot be compared")
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}

‎js-practice/mathOperations.js‎

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let num1 =10
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let num2 =20
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console.log(num1+num2)
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console.log(num1-num2)
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console.log(num1*num2)
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console.log(num1/num2)
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console.log(num1%num2)
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‎js-practice/objects.js‎

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// Objects are complex data types in js.
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// objects are similar to hash in java like key value pair
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let car = {
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type:"Hyundai",
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make:"2022",
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cost:1000000
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}
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// Object details can be accessed in two ways
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console.log(car.type)
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console.log(car["type"])
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// New property can be added in two ways
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car.number = 1234
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car["number"] = 1234
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// delete is used to remove property form the object
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delete car.make
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// now car will have 3 keys
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let car = {
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type:"Hyundai",
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number:1234,
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cost:1000000
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}

‎js-practice/switchCase.js‎

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let day = 3
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switch (day) {
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case 1:
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console.log("Day is Sunday")
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break;
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case 2:
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console.log("Day is Monday")
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break;
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case 3:
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console.log("Day is Tuesday")
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break;
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case 4:
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console.log("Day is Wednesday")
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break;
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case 5:
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console.log("Day is Thursday")
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break;
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case 6:
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console.log("Day is Friday")
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break;
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case 7:
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console.log("Day is Saturday")
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break;
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default:
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console.log("given day is not in between 1-7")
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}
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‎js-practice/variables.js‎

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//Let, Var and cost are the three ways to declare variables in JS
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// Let is been introduced in ES6
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// JS is a Dynamically typed language
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let i = 20 // i is initialized as number
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i="Hello" // it can be assigned with a string
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i = [1,2,3,4] // can be re-assigned to an array
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// similar in case of var
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var j = 20 // i is initialized as number
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j="Hello" // it can be assigned with a string
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j = [1,2,3,4] // can be re-assigned to an array
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// variables declared with let are only available inside the block where the variable is declared
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// Ex
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function let_scope_Ex(){
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if(true){
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let let_variable = "Hello World"
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console.log("inside block scope::"+let_variable)
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}
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console.log("Outside Block scope::"+let_variable) // throw an error
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}
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function var_scope_Ex(){
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if(true){
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let var_variable = "Hello World"
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console.log("inside block scope::"+var_variable)
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}
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console.log("Outside Block scope::"+var_variable) // print Hello world without any error
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}
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// Const keyword is used to declare constants
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// variables declared with const keyword cannot be reassigned
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const PI = 3.14
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PI = 3.1428 // this will throw an error as const re-assigned with a new value

‎package.json‎

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{
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"name": "w2a-cypress",
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"version": "1.0.0",
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"description": "",
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"main": "index.js",
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"type": "module",
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"scripts": {
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"test": "echo \"Error: no test specified\" && exit 1"
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},
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"author": "",
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"license": "ISC"
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}

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