Python Tutorials
Tags: ,
Categories: ,

Overview

Looping through Python list items can be done by using a for loop, while loop, or list comprehension.

Looping Through a List

my_list = ["Ferrari", "Maserati", "Alfa Romeo"]

for x in my_list:
    print(x)
Ferrari
Maserati
Alfa Romeo

Looping Through a List Using Index Numbers

my_list = ["Ferrari", "Maserati", "Alfa Romeo"]

for i in range(len(my_list)):
    print(my_list[i])
Ferrari
Maserati
Alfa Romeo

Note

Arrays count starting from zero NOT one. So item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on.

Looping Through a List Using a While Loop

my_list = ["Ferrari", "Maserati", "Alfa Romeo"]

i = 0
while i < len(my_list):
    print(my_list[i])
    i = i + 1
Ferrari
Maserati
Alfa Romeo

Looping Using List Comprehension

my_list = ["Ferrari", "Maserati", "Alfa Romeo"]
[print(x) for x in my_list]
Ferrari
Maserati
Alfa Romeo

Note

The return value is a new list, leaving the old list unchanged.

Python Notes:

  • The most recent major version of Python is Python 3; however, Python 2 is still in use and quite popular, although not being updated with anything other than security updates
  • Python uses new lines to complete a command, as opposed to other programming languages which often use semicolons or parentheses
  • Python relies on indentation, using whitespace to define scope, such as the scope of loops, functions, and classes; other programming languages often use curly-brackets for this purpose
  • Python string methods return new values, and DO NOT change the original string
  • Python tuples are unchangeable after created (their items CANNOT be changed or re-ordered at a later point)
  • Python sets are unordered (may appear in random orders when called), unchangeable (the value of individual items cannot be changed after creation), and unindexed (items cannot be referred to by index or key)
If you like our content, and find it helpful, please consider making a small donation. Thank you!

We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.