JavaScript - sum array of numbers

In this article, we would like to show you how to find the sum of an array of numbers using JavaScript.

Quick solution:

// ONLINE-RUNNER:browser;

const numbers = [1, 2, 3];
const sum = (accumulator, number) => accumulator + number;

console.log(numbers.reduce(sum)); // 6

Alternative solution

In this section, we present an alternative solution for older JavaScript versions.

// ONLINE-RUNNER:browser;

function add(accumulator, number) {
    return accumulator + number;
}

var numbers = [1, 2, 3];
var sum = numbers.reduce(add, 0); // reduce(callbackFunction, initialValue);

console.log(sum); // 6

See also

1. JavaScript - subtract array of numbers

References

1. Array.prototype.reduce() - JavaScript | MDN