Learn the basics of Ruby with hands-on practice.

Become a Ruby Professional

Do you want to be an interpreted language geek? Are you tired of getting entangled in the dense syntaxes? Does it irritate you to compile your code to machine language first? Are you looking for an easy-to-use scripting language? Well, Ruby is the best pick for you then!
This introductory module will be providing you with hands-on practice with the support of a bunch of interactive illustrations, exercises, and the integral topics of variables, built-in classes, objects, conditionals, blocks, and much more!

Learn Ruby from Scratch

# Predicate methods

If we look at the list of methods defined for a `String` object, we see that there are methods that end with a question mark (`?`). 


In Ruby convention, these methods return either `true` or `false`. For example, we can ask a number if it’s even or odd:






This makes them read like a question, which is pretty cool.

We can also ask the number if it’s between two other numbers. This method needs us to pass those two other numbers. So, we now also have an example of a method that takes two arguments:





Learn about the predicate methods in Ruby and how to use them.

Predicates

Predicate methods