What is number.integer? in Ruby?

The integer? method is a method that checks if a number is an integer.

In Ruby, numbers are either integers or floats. Numbers without decimal points are called integers. For example:

• 2,5
• 100
• 180000
• 348888787
• 2_000

While numbers with decimal points are called floating-point numbers or floats. For example:

• 1.3
• 3.0
• 399.99

Note: In Ruby, underscores _ can be used to separate a thousand places e.g., 2500 is the same as 2_500

If a number is truly an integer, the integer? method returns true. If it is not an integer, it returns false.

Syntax

number.integer?

Parameter

This method takes no parameters.

Return value

The method returns true if a number is an integer. Otherwise, it returns false.

Code

In the code below, we call the integer? methods on certain numbers and print the values returned to the console.