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Hailey
Hailey

Posted on

How can I generate random numbers in JavaScript?

#help

Hi everyone! Excited to be here!

I'm working on a basic JavaScript 'app' that just runs in the JS console on my browser. I'm trying to figure out how to generate random numbers as a part of it, but am having a hard time.

Any suggestions?

Oldest comments (3)

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ryanstreur profile image
Ryan Streur • • Edited

Hi! The way I do it is by using the "random" function on the built-in Math object. There are a bunch of great examples on MDN, but in a nutshell:

Math.random()  // will generate a random number between zero and one
Math.random() * x // will generate a random number between zero and x
Math.ceil(Math.random() * x) // will genearte a random integer between zero and x
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aaron profile image
Aaron McCollum •

This ^^^

Also, you can write (Math.random() * x) + 1 to generate a number between 1 and x.

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robertcego profile image
Robert Cerdas Gómez • • Edited

Hi Hailey! We are happy that you joined the coders community! Welcome!

This is a function to get random numbers from 0 to 10:

const randomNumbers = () => Math.floor(Math.random() * 10);