text: '''         FUNCTIONS
  Functions are pieces(block) of code that does something.
  They are reusable.
  They execute or run when called by thier name.
  They can have parameters(variables) and arguments(values)
  They can return data as a result.
  
  def function_name():
      print("Hello World!")
  
  Calling a Function
  Also known as: running, executing, invoking.
  You can call a function by it's name and add parenthesis.
  Any parameters or arguments are placed inside the parenthesis.
  
  '''
  def sum(x,y):
      print(x + y)
  
  sum(4, 5)
  