1// object to loop through
2let obj = { first: "John", last: "Doe" };
3
4// loop through object and log each key and value pair
5//ECMAScript 5
6Object.keys(obj).forEach(function(key) {
7    console.log(key, obj[key]);
8});
9
10//ECMAScript 6
11for (const key of Object.keys(obj)) {
12    console.log(key, obj[key]);
13}
14
15//ECMAScript 8
16Object.entries(obj).forEach(
17    ([key, value]) => console.log(key, value)
18);
19
20// OUTPUT
21/*
22   first John
23   last Doe
24*/

1Object.keys(obj).forEach(function(key) {
2  console.log(key, obj[key]);
3});

1for (const [key, value] of Object.entries(object1)) {
2  console.log(`${key}: ${value}`);
3}
4

1const fruits = { apple: 28, orange: 17 }
2
3for(key in fruits){
4	console.log(key)
5}