Write the steps to define the function in python

Answer : 

Here are few rules to define a function in Python.

• Function blocks begin with the keyword def followed by the function name and parentheses ( ( ) ).
• Any input parameters or arguments should be placed within these parentheses. You can also define parameters inside these parentheses.
• Parameters (arguments) through which we pass values to a function. They are optional.
• The code block within every function starts with a colon (:) and is indented.
• Optional documentation string (docstring) to describe what the function does.
• The statement return [expression] exits a function, optionally passing back an expression to the caller. A return statement with no arguments is the same as return None.

Let us see a python function that finds the even and odd number.

# A simple Python function to check 
# whether data is even or odd 
def evenOdd( data ): 
  if (data % 2 == 0): 
    print "even"
  else: 
    print "odd"
# Function Call 
evenOdd(27) 
evenOdd(6)

Output:

odd
even