Generate an array of random integers in a given range

Return count integers from min to max, both included.

JavaScriptNode.js & browsers Version 1.0.0 · MIT · .md

function randomIntegers(min, max, count) { return Array.from({ length: count }, () => Math.floor(Math.random() * (max - min + 1)) + min); }

Usage

const values = randomIntegers(1, 100, 10);
values.length; // → 10
values.every(n => Number.isInteger(n) && n >= 1 && n <= 100); // → true

Lines marked → were executed in Node.js 22 and in headless Chromium, and each result was compared with the value shown. Lines marked e.g. are illustrative.

Know the limits

• Values can repeat. For distinct values, shuffle a range and take the first count, as in Get random items of an array.

The function above is the code the usage lines run. It does not validate its arguments; add checks where it receives untrusted input.

Keep exploring

• Generate a random boolean — Return true or false with equal probability.
• Generate a random floating point number in given range — Scale Math.random into [min, max).
• Generate a random hex color — Return a #rrggbb color from 24 random bits.