for loop for arrays in JavaScript

Arrays can also be iterated with the for loop. Let's see how it's done. Let's say we have an array like this:

let arr = [1, 2, 3, 4, 5];

Let's output the elements of this array in a loop:

for (let i = 0; i <= arr.length - 1; i++) {
	console.log(arr[i]);
}

You can not subtract one from the array length, but use a strict comparison:

for (let i = 0; i < arr.length; i++) {
	console.log(arr[i]);
}

Iterating over the array with the for loop gives you more control over what happens. For example, you can display elements not from zero, but from the first:

for (let i = 1; i < arr.length; i++) {
	console.log(arr[i]);
}

You can display elements in reverse order:

for (let i = arr.length - 1; i >= 0; i--) {
	console.log(arr[i]);
}

Print all the elements of the following array to the console:

let arr = ['a', 'b', 'c', 'd', 'e'];

Print to the console all the elements of the next array, excluding the zero and the last:

let arr = ['a', 'b', 'c', 'd', 'e'];

Print the elements of the following array to the console in reverse order:

let arr = ['a', 'b', 'c', 'd', 'e'];

Fix the error in the following code:

let arr = ['a', 'b', 'c', 'd', 'e'];
		
for (let i = 0; i <= arr.length; i++) {
	console.log(arr[i]);
}