How To Comment Out Multiple Lines In Python

In this tutorial, you will learn how to comment out multiple lines in Python.

Commenting on the code is an important part of any programming language.

Comments provide a way to document what your code is doing.

Why you wrote it a certain way, and how it works.

This can help other developers (and your future self) understand your code.

And make any possible changes to it more easily.

Comments can help you track down and fix bugs in your code.

By commenting on parts of your code, you can isolate the problem and narrow down its source.

Types of Comments in Python

There are three types of comments in the python programming language.

• Single line comments
• Multi line comments
• Docstring comments

1: Single line Comments

A single line comment is a type of comment in programming that you can use:

1. to explain a line of code or
2. to provide additional context for the code

Comments can help you maintain your code over time.

As you make changes to your code, comments can remind you of why you wrote the code a certain way and how it works.

Single line comments are often used to provide documentation for code.

Or to temporarily disable a line of code for testing or debugging purposes.

How to make single line comments in Python?

In Python, you can make single-line comments using the “#” character.

Any text that comes after the “#” character on a line is ignored by the Python interpreter.

Here’s an example:

# This is a single-line comment in Python

print("Hello, world!")  # This is another single-line comment

Output

In this example, the first line is a single-line comment.

It does not affect the execution of the code.

The second line prints the string “Hello, world!” to the console.

The interpreter ignores the text after “#” and treats it as a comment.

In addition, You can use single line comments to tell what a particular line is doing.

And it is a good practice to use comments to explain your code.

2: Multi lines comments in Python

In Python, a multi-line comment is a type of comment that spans multiple lines.

You can use it to provide some explanation.

Or you can disable a block of code using the multi line comments.

How to make multi line comment in Python

# This is a multi-line comment in Python
# It consists of multiple single-line comments
# You can use this method to provide documentation for your code
print("Hello, world!")

Output

The interpreter treats each line after “#” as a comment and ignores it.

You can use multi line comments to provide detailed documentation for functions and classes.

They are also useful for temporarily disabling a block of code for testing or debugging purposes.

3: Docstring comments in Python

In Python, docstrings are a type of multi-line comment.

You can use docstring comments to provide documentation for classes, functions, and modules.

The triple quotes enclose the docstring comments.

And they are the first statement in a module, function, or class.

How to make docstring comments in Python

Here’s an example of a docstring for a function in Python:

def square(x):
    """
    Returns the square of a number.

    Parameters:
    x (int): The number to be squared.

    Returns:
    int: The square of the input number.
    """
    return x ** 2

result = square(3)
print(result)

Output

In this example, the triple quote encloses the docstring.

And this is the first statement in the function.

Besides that, the docstring provides information about the function’s purpose, its parameters, and its return value.

You can access this information using the built-in help() function.

How To Comment Out Multiple Lines In Python

In Python, you can comment out multiple lines of code using docstring comments or by using the “#” character on each line.

Method 1: Using the “#” Character

To comment out multiple lines of code using the “#” character,

you can add a “#” character at the beginning of each line.

# This is a multi-line comment in Python
# You can use it to comment out multiple lines of code
# like this:
print("Hello, World!")
print("Welcome to Python")
#print("This line is commented out")

Output

Method 2: Using Multi-Line Comments

To comment out multiple lines of code using multi-line comments,

you can enclose the lines within triple quotes.

Here is an example:

"""
This is a multi-line comment in Python
You can use it to comment out multiple lines of code
like this:
"""
print("Hello, World!")
print("Welcome to Python")
print("This line is not commented")

Output

In this example, all three print() statements are commented out using multi-line comments.