How to Use JavaScript Math.random() as a Random Number Generator

How to Use JavaScript Math.random() as a Random Number Generator

You will learn how to generate a random number using the Math.random() method by building a mini dice game. The Math object in JavaScript is a built-in object that has properties and methods for performing mathematical calculations.

Often while developing projects, you will find yourself looking for ways to generate random numbers.

The most common use cases for generating random numbers are games of chance like rolling dice, shuffling playing cards, and spinning roulette wheels.

In this guide, you will learn how to generate a random number using the Math.random() method by building a mini dice game.

The Math.random() method

The Math object in JavaScript is a built-in object that has properties and methods for performing mathematical calculations.

A common use of the Math object is to create a random number using the random() method.

const randomValue = Math.random();

But the Math.random() method doesn't actually return a whole number. Instead, it returns a floating-point value between 0 (inclusive) and 1 (exclusive). Also, note that the value returned from Math.random() is pseudo-random in nature.

Random numbers generated by Math.random() might seem random, but those numbers will repeat and eventually display a non-random pattern over a period of time.

This is because algorithmic random number generation can never be truly random in nature. This is why we call them pseudo-random number generators (PRNGs).

To learn more about the Math.random() method you can check out this guide.

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