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JavaScript - create an array containing 1...N

10 points
Created by:
Saim-Mccullough
688

In this short article, we would like to show how create array containing numbers from 1 to N in JavaScript / ES6.

Quick solution:

// ONLINE-RUNNER:browser;

let n = 5;
let array = Array.from({length: n}, (_, i) => i + 1);

for (let entry of array) {
    console.log(entry); // 1 2 3 4 5
}

or:

// ONLINE-RUNNER:browser;

let n = 5;
let array = Array(n).fill().map((_, i) => i + 1);

for (let entry of array) {
    console.log(entry); // 1 2 3 4 5
}

 

Alternative titles

  1. JavaScript / ES6 - fill array with numbers 1..N
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