6 Python Lambda

1. What is a Lambda Function?

A lambda function is a small, one-line function in Python.

In simple words:
👉 Lambda is a quick function
👉 Written in one line
👉 Used for small tasks

2. Normal Function vs Lambda Function

Normal Function

Lambda Function

3. Basic Lambda Example

Example

Output:

4. Lambda with Two Arguments

Example

5. Lambda Inside Another Function

Example

6. Lambda with map()

Example

7. Lambda with filter()

Example

8. Lambda with sorted()

Example

9. Lambda with Conditional Expression

Example

10. When Should You Use Lambda?

Use lambda when:

• Function is small

• Code is short

• You don’t need function again

11. When NOT to Use Lambda?

❌ Complex logic
❌ Multiple lines
❌ Large programs

Use normal function instead.

12. Common Beginner Mistakes

❌ Writing Multiple Lines

❌ Error.

❌ Forgetting to Call Lambda

✔ Call it:

13. Simple Practice Examples

Example 1: Square Number

Example 2: Add 5

Example 3: Check Age

14. Summary (Python Lambda)

✔ One-line function
✔ No function name needed
✔ Fast and short
✔ Useful with map, filter, sort
✔ Avoid for complex logic

📘 Perfect for Beginner eBook

This chapter is ideal for:

• Python beginner books

• School & college students

• Self-learners

If you want next, I can write:

• Recursion

• Modules

• Exception Handling

• File Handling

Just tell me 😊