Functions

A Function is a block of code that performs a specific task or set of task. Functions are defined by specifying a name for the function l. A set of input parameters and a set of instructions that should be executed when the function is called.

When a function is called it runs the instructions and may return a value or perform some other actions.

For Example: 

1: A function could be use to add 2 numbers together 

add_number(x,y)

returnx+y

2: calculate a average of list of numbers

3: perform complex data analysis task.

4: calculate factorial of given number:

factorial(n)

If n ==0

return 1

else

return n*factorial(n-1)

factorial ()

Parameters and Dr return value:- That allows û to take input and produce output.

Parameters :- parameters are values that are passed into a function to modify its behaviour or allow it to perform specific action. They are specified in the function definition