1var data = [1, 2, 3, 4, 5, 6];
2
3// traditional for loop
4for(let i=0; i<=data.length; i++) {
5 console.log(data[i]) // 1 2 3 4 5 6
6}
7
8// using for...of
9for(let i of data) {
10 console.log(i) // 1 2 3 4 5 6
11}
12
13// using for...in
14for(let i in data) {
15 console.log(i) // Prints indices for array elements
16 console.log(data[i]) // 1 2 3 4 5 6
17}
18
19// using forEach
20data.forEach((i) => {
21 console.log(i) // 1 2 3 4 5 6
22})
23// NOTE -> forEach method is about 95% slower than the traditional for loop
24
25// using map
26data.map((i) => {
27 console.log(i) // 1 2 3 4 5 6
28})
1let array = ['Item 1', 'Item 2', 'Item 3'];
2
3// Here's 4 different ways
4for (let index = 0; index < array.length; index++) {
5 console.log(array[index]);
6}
7
8for (let index in array) {
9 console.log(array[index]);
10}
11
12for (let value of array) {
13 console.log(value); // Will log each value
14}
15
16array.forEach((value, index) => {
17 console.log(index); // Will log each index
18 console.log(value); // Will log each value
19});
1var colors = ["red","blue","green"];
2for (var i = 0; i < colors.length; i++) {
3 console.log(colors[i]);
4}
1const array = ["one", "two", "three"]
2array.forEach(function (item, index) {
3 console.log(item, index);
4});
1let numbers = [1,2,3,4,5];
2let numbersLength = numbers.length;
3for ( let i = 0; i < numbersLength; i++) {
4 console.log (numbers[i]);
5}