Javascript-esq random floating point number 0-1 in Racket?

I've checked out the docs for this on docs.racket-lang.org, and looked all over the internet for a possible implementation of this, but all I'm looking for is a random number generating function that generates a number between 0 and 1. For instance, in Javascript:

> Math.random()
0.16275149723514915

I'm looking for this in Racket, and I'd implement it if I could, but I just don't have the chops (yet).