Ruby's **`modulo()` function** returns the remainder of two given numbers that are divided.

Figure 1, below, shows the visual representation of the `modulo()` function.

# Syntax

``` ruby
num_1.modulo(num_2)
# where num_1 and num_2 are the numbers whose modulo is to be calculated
# num_1 % num_2 
```
# Parameter

This function requires another number, `(num_2)`, as a parameter to calculate the `modulo`.

# Return value
This function returns the remainder after the two given numbers are divided.

# Code
The following example shows how to use `modulo()` function in Ruby.

#Both positive numbers
print "(13).modulo(2) : ",(13).modulo(2) , "\n"

#one negative and another positive
print "(16).modulo(-3) : ",(16).modulo(-3) , "\n"
print "(21).modulo(-4) : ",(21).modulo(-4) , "\n"

#fractional number
print "(22.5).modulo(1.6) : ",(22.5).modulo(1.6) , "\n"


What is the modulo() function in Ruby?

The modulo() function in Ruby returns the remainder of dividing two numbers.