What is Python Function ?

Editor — Sun, 18 Jul 2021 13:56:37 +0000

Python Function

The Python function is defined by a def statement. The syntax looks like this: def function-name (Parameter list): statements, i.e. the function body. The parameter list contains none or more parameters. Parameters are known as arguments, if the function is called.
A python function is a “callable” (which just means something you can invoke) that repeats a set of steps that you pre-define.

- Function blocks begin with the keyword def followed by the function name and parentheses ( ( ) ).
- Any input parameters or arguments must be placed within these parentheses. Now you will define the parameters within the parentheses.
- The initial statement of a function is optional – the documentation string of the function (docstring).
- The code block within every function starts with a colon (:) and is indented.
- The statement return [expression] exits a function, optionally passing back an expression to the caller. The return statement with no arguments is the similar as return none.

def functionname( parameters ):
   "function_docstring"
   function_suite   
   return [expression]