# Accumulation of array elements in loops in JavaScript

Let's use a loop to find the sum of the array elements.

`let arr = [1, 2, 3, 4, 5]; let res = 0; for (let elem of arr) { res += elem; } console.log(res); // the required sum`

Given an array:

`let arr = [2, 5, 9, 3, 1, 4];`

Find the sum of the array elements.

Given an array:

`let arr = [2, 5, 9, 3, 1, 4];`

Find the sum of elements that are even numbers.

Given an array:

`let arr = [2, 5, 9, 3, 1, 4];`

Find the sum of the squares of the array elements.

Given an array:

`let arr = [2, 5, 9, 3, 1, 4];`

Find the product of the array elements.

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