Emulate a dice throw

Return an integer from 1 to 6.

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

function throwDice() { return Math.floor(Math.random() * 6) + 1; }

Usage

const rolls = Array.from({ length: 600 }, throwDice);
rolls.every(n => Number.isInteger(n) && n >= 1 && n <= 6); // → true
new Set(rolls).size; // → 6
throwDice(); // e.g. 4

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

• The original’s ~~ truncates like Math.floor only for non-negative numbers below 2³¹; Math.floor states the intent.
• Math.random suits games and sampling, not anything security- or money-related.

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

• Convert Celsius to Fahrenheit — Apply the temperature conversion without rounding the result.
• Convert hex to RGB — Expand #rgb if needed and read the red, green and blue channels.
• Convert URL parameters to object — Read a query string into an object; repeated keys become arrays.