9 Python String Formatting

1. What is String Formatting?

String formatting means putting values inside a string.

In simple words:
👉 We create a message
👉 Then we insert numbers or text into it

Example:

2. Old Way: Using + (Not Recommended)

Example

👉 This works, but it is messy.

3. Using format() Method

This is a clean and easy way.

Example

4. Using Index in format()

Example

5. Using Named Placeholders

Example

6. Using f-Strings (Best & Modern Way)

Available in Python 3.6+

Example

7. f-String with Expression

Example

8. f-String with Function

Example

9. Formatting Numbers

Example: Decimal Points

Output:

10. Formatting Date and Time

Example

11. Formatting with Alignment

Example

12. Common Beginner Mistakes

❌ Forgetting f

✔ Correct:

❌ Wrong Placeholder Count

❌ Extra value ignored.

13. Simple Practice Examples

Example 1: Price Message

Example 2: Result

Example 3: Table

14. Summary (Python String Formatting)

✔ Used to insert values in string
✔ format() is simple
✔ f-strings are best
✔ Clean and readable code
✔ Very useful in real programs

📘 Perfect for Beginner eBook

This chapter is ideal for:

• Python beginner books

• School & college students

• Self-learners

If you want next, I can write:

• String Methods

• File Handling

• Exception Handling

• Mini Python Projects

Just tell me 😊