What are variadic parameters in Ruby methods?

What are variadic parameters in Ruby methods?

Variadic parameters allow a method to accept an arbitrary number of arguments. You can use the splat operator (*) to achieve this.

Can you show me an example of how to use variadic parameters?

Sure! Here's a simple example:

def sum(*numbers)
  numbers.reduce(0, :+)
end

puts sum(1, 2, 3)  # Output: 6
puts sum(4, 5)     # Output: 9

This method takes any number of arguments and returns their sum.

What happens if I pass no arguments to a method with variadic parameters?

If you pass no arguments, the method will receive an empty array. For example, sum() would return 0 in the above example.

Are there any limitations to using variadic parameters?

One limitation is that you can only have one variadic parameter in a method. It must be the last parameter if there are other parameters.