Python Functions

#python #programming #beginners #100daysofcode

Functions are a convenient way to group our code into reusable blocks.

In Python defining a function looks something like this.

def function_name():
    #function tasks go here

def keyword indicates the beginning of a function.
Following the function name is parenthesis ( ) that can hold input values.
A colon : marks the end of the function
Similar to loops and conditions in python, code inside a function must be indented to indicate that they are part of the function.

Calling a function

Now, to call a function you must type out the functions name followed by ( ) parentheses. This does not need to me indented.

function_name()

Function Parameters allow our function to take in data as an input value.

Heres an example

def welcome_guest(name):
  print("Welcome to our Airbnb!")
  print("We are excited to have you come stay with us" + name)

We would use our parameter by passing an argument to the function like this

welcome_guest("Sam")

This would output:

Welcome to our Airbnb!
We are excited to have you come stay with us Sam.

Here is a visualization of the distinction between a parameter and an argument