What are functions?
A function is a block of statements that can be used repeatedly in our code. Saves our time.
Types of functions
There are some built-in functions that are part of Python.
Alternatively, we can define tasks according to our needs.
User-defined functions
For simple understanding, we can stitch our own clothes for our convenience python allows you to create such types of functions and they are named User-defined functions
Syntax
def function_name(argument_1, argument_2, ...) :
statement1
statement2
Syntax explanation
here we created a function with
- def keyword
- unique function name
- passing arguments
- condition statements for our needs
now the question is
How to call functions in python
function_name(arg_1, arg_2) Argument operations:
Explanations
we can call a function by using the function name, with parameters passed inside the parenthesis.
Simple example for python function
def avg_num(p, q):
print("Average of ",p," and ",q, " is ",(p+q)/2)
avg_num(5, 6)
Output
Average of 5 and 6 is 5.5
Code Explanation
- Line 1
- created a function using def keyword
- named the function as “avg_num”
- passed parameters p and q
- Line 2
- to display the parameters and the calculated output we’re using print builtin function
- providing our condition for average as (p+q)/2
- Line 3
- calling the function using the functions created unique name and passing the values to the parameters
We can also call a function without arguments
Syntax
def function_name() :
statement1
statement2
