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JavaScriptで範囲指定乱数生成

Last updated at Posted at 2021-06-06

はじめに

JavaScript(TypeScript)で乱数を作る時、いつも迷うのでここにメモしておく

やりたいこと

最小値(min)以上、最大値(max)以下の乱数を取得する。

random.js
const rand = (min, max) => {
  return (Math.floor(Math.random() * (max - min + 1)) + min);
};
random.ts
const rand = (min: number, max: number): number => {
  return (Math.floor(Math.random() * (max - min + 1)) + min);
};
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