💬 Python Comments (2025): Single-line, Inline & Multi-line Explained
🔍 What Are Comments in Python?
Comments are lines in your Python code that the interpreter ignores. They’re meant for humans, not the machine—to explain, document, or temporarily disable parts of the code.
✅ Why Use Comments?
- 🧠 Explain complex code for future readers (or yourself!)
- 🐞 Debug by disabling lines temporarily
- 📝 Document what each block/function does
✍️ Types of Comments in Python
1️⃣ Single-line Comments
Start a comment with a hash symbol #. Everything after # is ignored.
# This is a single-line comment
print("Hello") # Comment after code
2️⃣ Multi-line Comments (Docstrings)
Python doesn’t have formal multi-line comments, but triple quotes (''' or """) are often used as a workaround.
"""
This is a multi-line comment
or documentation string (docstring)
"""
print("Hello")
🔹 While triple quotes are technically strings, they’re often used for block comments or documentation.
3️⃣ Inline Comments
These appear at the end of a line of code:
x = 10 # Store user age
✅ Keep inline comments brief and to the point
⚠️ Best Practices for Writing Comments
| Tip | Why It Matters |
|---|---|
| Keep comments short and clear | Easier to read |
| Don’t repeat obvious things | Wastes space |
| Update outdated comments | Old comments can mislead |
| Use complete sentences if needed | For clarity in large code blocks |
❌ Bad vs ✅ Good Comments
x = 5 # set x to 5 ❌ Obvious
# Get user input and validate age ✅ Helpful
📌 Summary – Python Comments
| Type | Symbol/Usage |
|---|---|
| Single-line | # comment here |
| Inline | code # comment here |
| Multi-line | ''' or """ ... """ |
| Ignored by | Python interpreter |
❓ FAQs – Python Comments
❓ How do you write a comment in Python?
Use the # symbol to write a single-line comment:
# This is a comment
❓ Can you write multi-line comments in Python?
Python doesn’t have official multi-line comment syntax, but you can use triple quotes (''' or """) as a workaround:
"""
This is a multi-line comment
"""
❓ Do comments affect code execution in Python?
No. Comments are completely ignored by the Python interpreter and do not affect your program’s output.
❓ What’s the purpose of writing comments in code?
Comments help:
- Explain what the code does
- Make the code readable
- Document logic for future developers
- Temporarily disable lines for debugging
❓ Can I place a comment after a line of code?
Yes. These are called inline comments:
x = 10 # Store age of user
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