How to Generate Random Numbers in Ruby

In this article, you will learn how to generate random numbers in Ruby.

Using the rand method

In Ruby, you can generate random numbers using the built-in rand method. The rand method returns a random float between 0.0 and 1.0, and you can use it to generate random numbers within a specific range by scaling and shifting the output.

Here are a few examples:

Generating a random float between 0.0 and 1.0:

random_number = rand

Generating a random integer between 0 and 9:

random_number = rand(10)

Generating a random integer between 1 and 10:

random_number = rand(1..10)

Generating a random float between -5.0 and 5.0:

random_number = rand * 10 - 5