Accessing Array Elements in JavaScript

Accessing the elements of an array is similar to accessing the characters of a string. Each element of the array has its own index: the first element has the index 0, the second has the index 1, and so on. These indices are called also keys of the array elements. Let's look at an example. Let's say we have the following array:

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

Let's display its elements:

console.log(arr[0]); // shows 'a'
console.log(arr[1]); // shows 'b'
console.log(arr[2]); // shows 'c'

Create an array with elements 1, 2, 3. Display each of these elements on the screen.

Given the following array:

let arr = [1, 2, 3];

Display each of its elements.

Given the following array:

let arr = [1, 2, 3];

Display the sum of the elements of this array on the screen.

Given the following array:

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

Use this array to output the following string:

'a+b+c+d'