Function Default value for argument in Ruby

In Ruby, default values can be assigned to optional parameters of a method or function. This allows the programmer to provide a standard or default value for the argument in case the argument is not passed while calling the method or function.

Here's the syntax to add default values in a Ruby method:

def method_name(param1, param2=default_val)
  # Method body
end

In this example, param1 is a mandatory parameter and param2 is an optional parameter with a default value of default_val. If the value of param2 is not passed while calling the method, it will automatically take the value of default_val.

Here's an example:

def welcome(name, message = "Welcome to our website!")
  puts "#{name}, #{message}"
end
# Call the method without passing second argument

welcome("John")

# Output: John, Welcome to our website!
# Call the method with passing second argument

welcome("Joey", "Thanks for visiting our website!")

# Output: Joey, Thanks for visiting our website!

In this example, welcome is a method that takes two arguments, name (mandatory) and message (optional) with a default value of "Welcome to our website!". If the value of message is not passed while calling the method, it will automatically take the default value.