10 Python None

1. What is None in Python?

None is a special value in Python.

In simple words:
👉 None means nothing
👉 It means no value
👉 It is not zero, not empty string, not False

2. Why Do We Use None?

We use None when:

• A variable has no value yet

• A function does not return anything

• We want to say “value is empty for now”

3. Simple Example of None

Example

Output:

4. None from a Function

If a function does not use return, it returns None.

Example

Output:

5. Check if Value is None

Always use is keyword.

Example

6. None vs 0 vs Empty String

Example

Output:

👉 None is different from everything.

7. Using None as Default Value

Example

8. None in Lists and Dictionaries

Example

9. None in Conditional Statements

Example

10. Common Beginner Mistakes

❌ Using == Instead of is

✔ Correct:

❌ Thinking None is False

❌ Wrong.

11. Simple Practice Examples

Example 1: Check User Input

Example 2: Function Return

Example 3: Update Value Later

12. Summary (Python None)

✔ None means no value
✔ Different from 0 and empty string
✔ Use is to check
✔ Common in functions and defaults
✔ Very important Python concept

📘 Perfect for Beginner eBook

This chapter is ideal for:

• Python beginner books

• School & college students

• Self-learners

If you want next, I can write:

• Python Boolean

• Truth Values in Python

• File Handling

• Mini Python Projects

Just tell me 😊