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loop.js
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237 lines (193 loc) · 4.67 KB
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/**
* ---------------------------- LOOP IN JAVASCRIPT ----------------------------
*/
// ----------------------------------------------------------------------------
/**
* NOTE : Structure of a for loop
*/
// for (initialization; condition; afterthought){
// statement
// }
// ----------------------------------------------------------------------------
/**
* TEST : Form a table for any number using loop
*/
// function Table(value){
// for(let i = 1; i <= 10; i++ ){
// console.log(i*value)
// }
// }
// Table(19)
// const Table = (val)=> {
// console.log(`TABLE OF ${val}`)
// for(let i = val; i <= val*10; i+=val ){
// console.log(i)
// }
// }
// Table(5)
// Table(11)
// Table(99)
// Table(202)
// WHILE LOOP
// const Table = (num)=>{
// let i = 1
// console.log(`TABLE OF ${num}`)
// while (i<=10) {
// console.log(i*num);
// i++
// }
// }
// Table(13)
// const Table = (num)=>{
// let i = num
// console.log(`Table of ${num} :`)
// while (i<=num*10) {
// console.log(i);
// i+=num
// }
// }
// Table(24)
// DO-WHILE LOOP
// function Table (value){
// let i = 1
// console.log(`${value}'s table`)
// do {
// console.log(i*value);
// i++
// } while (i<=10);
// }
// Table(23)
// function Table (number){
// let i = number
// console.log(`${number}'s table`)
// do {
// console.log(i);
// i+=number
// } while (i<=number*10);
// }
// Table(7)
// ----------------------------------------------------------------------------
/**
* TEST : For getting a square table
*/
// const sqTable = (end)=>{
// for (let i = 1; i <= end; i++) {
// console.log(`SQUARE OF ${i} \t = ${i*i}`)
// }
// }
// const sqTable = (end)=>{
// for (let i = 1; i <= end; i++) {
// console.log(`SQUARE OF ${i} \t = ${i**2}`)
// }
// }
// sqTable(10)
/**
* NOTE : Both the operator will return the same value
* Use anyone of them
*/
// ----------------------------------------------------------------------------
/**
* TEST : For getting exponential values of any range or a single value
*/
// function power(expo, start, end) {
// if (start == undefined) {
// console.log("PLEASE PASS ATLEAST TWO VALUES");
// } else if (end == undefined) {
// for (let i = start; i <= start; i++) {
// console.log(`SQAURE OF ${i} = ${i ** expo}`);
// }
// } else {
// for (let i = start; i <= end; i++) {
// console.log(`SQAURE OF ${i} = ${i ** expo}`);
// }
// }
// }
// power(2);
// power(2, 17);
// power(2, 17, 24);
/**
* NOTE : power(exponent_value, start, end)
* We can get exponent value of any single value
* By passing only two values as :
* power(exponent_value, start)
*/
// ----------------------------------------------------------------------------
/**
* TEST : Form an Infite loop
*/
// let i = 1
// while (i<=10) {
// console.log(i*3);
// // Declare an afterthought to avoid infinte loop
// }
// let i = 1
// do {
// console.log(i*3);
// // Declare an afterthought to avoid infinte loop
// } while (i<=10);
// ----------------------------------------------------------------------------
/**
* TEST : Look the usage of for-in loop
*/
// let OBJ = {
// notebook : "classmate",
// pencil : "doms",
// eraser : "doms",
// pen : "fort"
// }
// for (const key in OBJ) {
// const element = OBJ[key];
// console.log(key, element)
// }
/**
* NOTE : for-in loop specially used in objects
*/
// ----------------------------------------------------------------------------
/**
* TEST : Usaage of for-of loop and for-each loop
*/
// let ARRAY = ["AKASH", "SHIV", "SONAL", "SNEHA", "VIKASH"]
// for (const iterator of ARRAY) {
// console.log(iterator)
// }
// ARRAY.forEach(element => {
// console.log(element)
// });
/**
* NOTE : for-of and forEach loop specially used in array for iterating
*/
// ----------------------------------------------------------------------------
/**
* TEST : Break and continue statement
*/
// for (let i = 1; i <= 10; i++) {
// console.log("I am ",i)
// if(i==6){
// break
// }
// }
// for (let i = 1; i <= 10; i++) {
// if(i==6){
// break
// }
// console.log("I am ",i)
// }
// for (let i = 1; i <= 10; i++) {
// if(i==6){
// continue
// }
// console.log("I am ",i)
// }
/**
* NOTE : break statement stops the chain
* while continue statement continues the chain excluding the condition
*/
let obj = {
name : "vikash",
role : "coder",
age : 20
}
for (const key in obj) {
const element = obj[key];
console.log(element, key)
}