JavaScript - sum / subtract numbers in array with reduce()

0 points
Created by:

In this article, we would like to show you how to sum and subtract numbers with reduce() method in JavaScript.

1. Sum example

In below example, we execute sum function provided to the reduce() method that sums all the numbers in the array.

// ONLINE-RUNNER:browser;

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

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

2. Subtract example

In below example, we execute subtract function provided to the reduce() method that subtracts all the numbers in the array from the accumulator (first item in the array).

// ONLINE-RUNNER:browser;

var numbers = [10, 1, 2];
const subtract = (accumulator, number) =>  accumulator - number;

console.log(numbers.reduce(subtract)); //7


Native Advertising
Get your tech brand or product in front of software developers.
For more information Contact us
Dirask - we help you to
solve coding problems.
Ask question.

â€ïžđŸ’» 🙂