Tuturials

Python Comments

1. What are Comments in Python?

Comments are notes written inside the code for humans.
Python does not run comments.

Comments help to:

  • Understand code easily

  • Explain logic

  • Remember code later

Simple Example

# This line prints a message
print("Hello Python")

Python runs only:

print("Hello Python")

2. Single-Line Comments

Single-line comments start with #.

Example

# This is a single-line comment
print("Python is easy")

You can also write comment after code.

print("Hello") # This prints Hello

3. Multi-Line Comments (Docstrings)

Python does not have special multi-line comments,
but we use triple quotes to write multi-line notes.

Example

"""
This program shows
how Python comments work
"""
print("Welcome")

These are called docstrings.

4. Why Use Comments?

Comments make code:
✔ Easy to read
✔ Easy to understand
✔ Easy to fix later

Example Without Comment

a = 10
b = 20
print(a + b)

Example With Comment

# Adding two numbers
a = 10
b = 20
print(a + b)

The second one is better.

5. Comments for Explaining Steps

Example

# Take input from user
age = int(input("Enter age: "))

# Print next year age
print(age + 1)

6. Comments to Disable Code (Temporary)

Sometimes we don’t want a line to run.

Example

print("Start")
# print("This line will not run")
print("End")

Output:

Start
End

7. Good Comment Writing Tips

✔ Keep comments short
✔ Write simple English
✔ Explain why, not obvious code

Bad Comment

x = 10 # x is 10

Good Comment

x = 10 # Store default value

8. Common Beginner Mistakes

❌ Forgetting #

This is a comment
print("Hello")

✔ Correct:

# This is a comment
print("Hello")

❌ Writing Too Many Comments

# Print hello
print("Hello") # This prints hello

One comment is enough 🙂

9. Simple Practice Examples

Example 1: Commented Program

# This program prints user name
name = input("Enter your name: ")
print("Hello", name)

Example 2: Math with Comments

# Take two numbers
a = 5
b = 10

# Print sum
print(a + b)

10. Summary (Python Comments)

✔ Comments are for humans
✔ Python ignores comments
✔ Use # for single-line
✔ Use """ """ for multi-line notes
✔ Comments make code clean

📘 Perfect for Beginner eBook

This chapter is perfect for:

  • Python beginner books

  • School & college students

  • Self-learners

If you want next, I can write:

  • Python Variables (easy)

  • Python Input & Output

  • if–else statements

  • Loops (for, while)

  • Bangla + English version

Just tell me 😊

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