Variable Number of Parameters

Suppose you declare a method that takes two parameters, whenever you call this method, you need to pass two parameters along with it.

However, Ruby allows you to declare methods that work with a variable number of parameters. Let us examine a sample of this −

#!/usr/bin/ruby

def sample (*test)

   puts "The number of parameters is #{test.length}"

   for i in 0...test.length

      puts "The parameters are #{test[i]}"

   end

end

sample "Zara", "6", "F"

sample "Mac", "36", "M", "MCA"

In this code, you have declared a method sample that accepts one parameter test. However, this parameter is a variable parameter. This means that this parameter can take in any number of variables. So, the above code will produce the following result −

The number of parameters is 3

The parameters are Zara

The parameters are 6

The parameters are F

The number of parameters is 4

The parameters are Mac

The parameters are 36

The parameters are M

The parameters are MCA