Python Loops: for Loop and while Loop with Examples

 ✍️Introduction

In programming, we often need to repeat a task multiple times.

For example:

• Print numbers from 1 to 10

• Display all items in a list

Python uses loops to repeat a block of code.

In this article, you will learn:

• What loops are

• for loop

• while loop

• break and continue statements

What are Loops in Python?

Loops are used to execute a block of code repeatedly until a condition is satisfied.

Python mainly has two loops:

1. for loop

2. while loop

1️⃣ Python for Loop

The for loop is used to iterate over a sequence such as:

• list

• tuple

• string

• range

Syntax:

for variable in sequence:

    statement

Example 1: Print numbers

for i in range(1, 6):

    print(i)

Example 2: Loop through a list

languages = ["Python", "Java", "C"]

for lang in languages:

    print(lang)

2️⃣ Python while Loop

The while loop runs as long as the condition is true.

Syntax:

while condition:

    statement

Example:

i = 1

while i <= 5:

    print(i)

    i += 1

🔁 Difference Between for and while Loop

    for Loop                            while Loop

Used when number.       Used when condition

of iterations is known      is unknown 

Works with                             Works with  

sequences                                condition

Simple & clean             Needs manual control 

3️⃣ break Statement

The break statement is used to stop the loop immediately.

Example:

for i in range(1, 10):

    if i == 5:

        break

    print(i)

4️⃣ continue Statement

The continue statement skips the current iteration and continues with the next.

Example:

for i in range(1, 6):

    if i == 3:

        continue

    print(i)

5️⃣ else with Loop

Python allows else with loops.

The else block runs when the loop finishes normally.

Example:

for i in range(3):

    print(i)

else:

    print("Loop completed")

❌ Common Loop Mistakes

• Infinite loop

• Forgetting to update variable

• Wrong indentation

Example of infinite loop:

while True:

    print("Hello")

🎯 Why Loops are Important?

• Save time & code

• Used in data processing

• Important for exams & interviews

• Core concept of programming

Real-Life Example

password = "python123"

user_input = ""

while user_input != password:

    user_input = input("Enter password: ")

print("Access granted")

Conclusion

Python loops help execute tasks efficiently and repeatedly.

Understanding for and while loops is essential for writing powerful programs.

Practice loops daily to master Python programming.

💬 Let’s Interact!

What will be the output?

for i in range(2, 5):

    print(i)

Comment your answer 👇😊

📌 Related Articles:

• Python Conditional Statements

• Python Operators

• Python Keywords