Loops in Python - For Loop, While Loop and Nested Loops

Understanding Loops in Python: A Beginner's Guide:

Loops are a fundamental concept in programming, allowing you to repeat a block of code multiple times without writing it out repeatedly. This guide will introduce you to loops in Python, focusing on two main types: for loops and while loops. We'll also explore some practical examples to solidify your understanding.

What Are Loops?

In programming, loops are used to automate repetitive tasks. Instead of writing the same code multiple times, you can use a loop to execute it repeatedly until a certain condition is met.

1. For Loops:

A for loop in Python iterates over a sequence (such as a list, tuple, string, or range) and executes a block of code for each item in the sequence. Here's the basic syntax:

Example 1: Iterating Over a List

Output:

Example 2: Using the Range Function

The range() function generates a sequence of numbers, which is particularly useful in loops.

Example 3. Nested For Loops:

You can use a loop inside another loop, which is called a nested loop.

2.While Loops:

Basic Syntax

A while loop in Python repeats as long as a condition is true.

Syntax:

while condition:

    # code to execute

Example 1: Basic While Loop

Example 2: Using Break Statement

The break statement exits the loop immediately.

Example 3: Using Continue Statement

The continue statement skips the rest of the code inside the loop for the current iteration and moves to the next iteration.

3.Combining For and While Loops

You can combine for and while loops to create more complex loops. Here's an example where a for loop is nested inside a while loop.

Example: Nested For and While Loop

Conclusion

Loops are an essential part of programming, allowing us to execute code repeatedly without rewriting it. Understanding for and while loops in Python, along with concepts like nested loops and loop control statements, can significantly enhance your coding skills. Practice writing different types of loops to get comfortable with them, and soon you'll be able to implement them in various programming tasks with ease.

Happy coding!