how to create function in ruby code example

Example 1: ruby function

def double(x)
  x * 2
end

Example 2: how to create a method ruby

#start with 'def', name the method, add function, end with 'end'
def this_method_multiples_x_by_number_of_students
  x * number_of_students
end
# => class_name.this_method_multiples_x_by_number_of_students

Example 3: functions in ruby

# functions in ruby

def foo()
	# function body
end