JavaScript Loop and Iterate

Demonstration of JavaScript Loop

by Po-Jung Chen

JavaScript

let obj = {a:1, b:2, c:3};
let arr = [10, 20, 30]

/**
 * for...in
 **/
for (let prop in obj) {
	console.log('key-value:', prop,  obj[prop])
}

/**
 * for...of
 **/
for(let value of arr){
  console.log(value);  // 10, 20, 30
}