Python Loops Tutorial

1. The for Loop

We start learning Python loops with the for loop. A for loop is used for iterating over a sequence. Let's go!

The first for Loop

Range() in a for Loop 1/2

Range() in a for Loop 2/2

List & for Loop

If/Else in a for Loop

Break/Continue in a for Loop

Pass, Else in a for Loop

Enumerate() in a for Loop

Challenge

2. The while Loop

With the while loop, we can execute a set of statements as long as a condition is true. We are going to work with this loop and handle different problems!

The First while Loop

Infinite Loop

List & while Loop

If/Else in a while Loop

Break/Continue in a while Loop

Pass, Else in a while Loop

3. Nested Loops

A nested loop is a loop inside a loop. Sound difficult? Don't worry! We will handle this loop!

First Nested Loop Pattern

Nested for Loop

Nested while Loop

While Loop inside a for Loop

If/Else in a Nested Loop

Break/Continue in a Nested Loop

Challenge

Enumerate() in a for Loop

The enumerate() function proves valuable when we need to access both the value and its index within any sequence, such as a list or string.

For instance, a list serves as an ordered data structure that associates each item with a unique index number. Utilizing this index number, we can conveniently access or alter the corresponding value.

The syntax for using enumerate() is: for index, value in enumerate(___)

Note
As a quick reminder: index refers to the position of an element. In Python, we begin counting indexes from 0.

Examine the following code:

How does the code work?

Завдання

Count the quantity of numbers in the list that are multiples of three.

Configure the for loop with enumerate() to operate on numbers, employing i for indexes and v for values.
Establish the condition that checks whether a number is a multiple of three.
Increment the counter by 1 if the number meets the condition.
Display the value of the counter.

Все було зрозуміло?

Секція 1. Розділ 8

Python Loops Tutorial

Enumerate() in a for Loop

The enumerate() function proves valuable when we need to access both the value and its index within any sequence, such as a list or string.

The syntax for using enumerate() is: for index, value in enumerate(___)

Note
As a quick reminder: index refers to the position of an element. In Python, we begin counting indexes from 0.

Examine the following code:

How does the code work?

Завдання

Count the quantity of numbers in the list that are multiples of three.

Configure the for loop with enumerate() to operate on numbers, employing i for indexes and v for values.
Establish the condition that checks whether a number is a multiple of three.
Increment the counter by 1 if the number meets the condition.
Display the value of the counter.

Все було зрозуміло?

Секція 1. Розділ 8