In Python, comments are used to explain or annotate code. They are ignored by the Python interpreter and are solely for human readers. There are two types of comments in Python:

Types of comments

1. Single-line Comments

• Use the # symbol to create a single-line comment.
• Everything after the # on that line is considered a comment.

# This is a single-line comment
print("Hello, World!")  # This comment is after code

2. Multi-line Comments

• Python does not have a specific syntax for multi-line comments like some other languages.
• However, you can use multiple # symbols for each line or use a multi-line string (enclosed in triple quotes """ or ''').

# This is a multi-line comment
# using multiple single-line comments.
# It spans multiple lines.
"""
This is also a multi-line comment
using a multi-line string.
It is not assigned to any variable, so it is ignored.
"""
print("Hello, World!")

Best Practices for Using Comments

1. Explain Why, Not What: Comments should explain why something is done, not what is being done (the code itself should be clear enough for that).
2. Avoid Over-commenting: Too many comments can make code harder to read. Use comments only when necessary.
3. Keep Comments Updated: Ensure comments are updated when the code changes to avoid confusion.

Example

# Calculate the area of a circle
radius = 5
pi = 3.14159
area = pi * radius**2  # Formula: πr²
print("Area of the circle:", area)

In this example:

• The first comment explains the purpose of the code.
• The second comment clarifies the formula being used.

Python

Why is it called Python?

Guido van Rossum were inspired with BBC comedy series “Monty Python’s Flying Circus”. So he decided to  implementing a new programming language called Python.

What Foundation is behind  the Python?

The Python Software Foundation is an American non-profit organization launched on March 6, 2001 that holds the copyright on Python versions 2.1 and newer.