The First for Loop

In computer programming, a loop is a series of instructions that continuously repeats until a specific condition is met. Loops are essential for automating repetitive tasks and efficiently processing data.

We'll begin our exploration of Python loops with the for loop.

Syntax of the for Loop

item is a variable that takes the value of each element in the sequence one at a time;
sequence is the data you are iterating through, such as a list, string, or range;
The indented block of code below the for statement is executed for every item in the sequence.

Example: Printing Letters of a Travel Destination

Imagine we have the name of a city, "Sydney", and we want to print each letter of the city's name in a column. Here's how we can do this using a for loop:


              12345
            
city = 'Sydney'

# Printing every letter in the city's name
for letter in city:
    print(letter)

Explanation:

The variable city holds the string "Sydney";
The for loop iterates over each character in the string;
On each iteration, the variable letter takes the value of the next character in the string;
The print(letter) statement outputs the current character to the console.

This demonstrates how the for loop processes each character individually and performs the same operation—in this case, printing the character.

Task

Swipe to show code editor

Let's take this further! Imagine you have a list of cities you want to visit. Write a for loop to print each city's name on a new line:

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 1. Chapter 1

The First for Loop

We'll begin our exploration of Python loops with the for loop.

Syntax of the for Loop

item is a variable that takes the value of each element in the sequence one at a time;
sequence is the data you are iterating through, such as a list, string, or range;
The indented block of code below the for statement is executed for every item in the sequence.

Example: Printing Letters of a Travel Destination

Imagine we have the name of a city, "Sydney", and we want to print each letter of the city's name in a column. Here's how we can do this using a for loop:


              12345
            
city = 'Sydney'

# Printing every letter in the city's name
for letter in city:
    print(letter)

Explanation:

The variable city holds the string "Sydney";
The for loop iterates over each character in the string;
On each iteration, the variable letter takes the value of the next character in the string;
The print(letter) statement outputs the current character to the console.

This demonstrates how the for loop processes each character individually and performs the same operation—in this case, printing the character.

Task

Swipe to show code editor

Let's take this further! Imagine you have a list of cities you want to visit. Write a for loop to print each city's name on a new line:

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 1. Chapter 1

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Python Loops Tutorial

The First for Loop

Syntax of the for Loop

Example: Printing Letters of a Travel Destination

Explanation:

The First for Loop

Syntax of the for Loop

Example: Printing Letters of a Travel Destination

Explanation: