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Let us understand this with the help of an example:

                   Program 8: To add two numbers using all the three types of user-defined functions.




























                  You will get the following output:




















                  Creating a Function
                  We can create a function in the following ways:

                     Defining a Function: We use the def keyword to begin the function definition.
                     Naming a Function: Provide a meaningful name to your function.

                     Supply Parameters: The parameters (separated by commas) are given in the parenthesis following
                    the name of the function. These are basically the input values we pass to the function.
                     Body of the function: The body of the function contains Python statements that make our function
                    perform the required task. Syntax of creating a function is:

                    def < name of the function > (list of parameters)
                          <body>

                  Calling a Function

                  A  function  can be  called  anytime  from  other  functions  or  from the  command  prompt  after  the
                  definition. For calling a function, we type the function and pass the parameters.

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