Comments can be used to explain Python code.

Comments can be used to make the code more readable.

Comments can be used to prevent execution when testing code.

Creating a Comment

Comments starts with a #, and Python will ignore them:  

#This is a comment
print("Hello, World!")
            

Comments can also be added at the end of a line of code. Everything after the comment symbol (#) on that line is ignored by Python when the program runs.

print("Hello, World!") #This is a comment
            

Comments are not only used to explain code. They can also be used to temporarily disable code, preventing Python from executing it when the program runs.

#print("Hello, World!")
print("Cheers, Mate!")
            

Multiline Comments

Python does not really have a syntax for multiline comments.

To add a multiline comment you could insert a # for each line:

#This is a comment
#written in python
#more than just one line
print("Hello, World!")
            

Another way to write multi-line comments is by using triple quotes (''' or """).

Python ignores multi-line strings that are not assigned to a variable, so you can place your comment inside a triple-quoted string. Although this is not the official way to create comments, it is sometimes used for longer explanations.

""" is also called Docstrings (Documentation Strings).

"""
This is a comment
written in python
more than just one line
"""
print("Hello, World!")