In Python, comments are lines of code that are ignored by the interpreter and are used to add explanatory notes or to temporarily disable certain parts of the code. Comments are helpful for improving code readability and making it easier for others (including yourself) to understand the purpose and functionality of different sections of code.
Python supports two types of comments:
- Single-line comments: To add a comment that spans only a single line, you can use the hash symbol (
#). Any text following the hash symbol on the same line is considered a comment and is ignored by the interpreter. For example:
# This is a single-line comment print("Hello, World!") # This line prints a message
In the above example, the first line is a comment, while the second line prints the message “Hello, World!”.
- Multi-line comments: Python does not have a built-in syntax for multi-line comments like some other programming languages do. However, you can use triple quotes (
""") to create multi-line strings, which can serve as multi-line comments. These strings are ignored by the interpreter if they are not assigned to a variable or used in any other way. For example:
''' This is a multi-line comment. It can span multiple lines. ''' print("Hello, World!")
In this case, the triple-quoted string serves as a comment, and the message “Hello, World!” is printed.
It’s important to note that while comments are helpful for code documentation, they should not be overused. Well-written code with meaningful variable names and clear structure should minimize the need for excessive comments. Comments should focus on explaining the why and how, rather than restating the obvious.