In Python, comments are an essential part of writing clear and descriptive code. They allow you to include plain-text explanations alongside your code, which can be extremely helpful in making your code more human-readable and easy to understand. This tutorial will teach you how to make a comment in Python 3.
Step 1: Single-line comments
In Python, you can create a single-line comment using the pound sign #. When the Python interpreter encounters a pound sign, it treats the rest of the line as a comment, and it is not executed.
For example, let’s print a string ‘Hello, World!’ and include a single-line comment:
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# This code prints 'Hello, World!' print("Hello, World!") |
When you run the code above, you’ll see only the output of the print() statement. The comment is ignored.
Hello, World!
Step 2: Multi-line comments
Python does not have a specific syntax for multi-line comments. However, you can use triple quotes """ or ''' to create a multi-line string, and place it right before the part of the code you want to comment on. As long as you don’t use this string in any operation, Python will treat it as a comment.
Here’s an example to demonstrate a multi-line comment using triple quotes:
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""" This is a multi-line comment. You can write text on multiple lines, just like a regular string, but it will not be executed. """ print("Hello, World!") |
Again, running the code will only output the print() statement result.
Hello, World!
Step 3: Inline comments
You can also use single-line comments to add explanations and descriptions right next to the code they relate to. This is called an inline comment. To create an inline comment, just place the pound sign # followed by your comment on the same line as the code:
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print("Hello, World!") # Display the string 'Hello, World!' |
In this case, the code and the comment are on the same line, and the interpreter will still only execute the print() statement:
Hello, World!
Full Code
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# This code prints 'Hello, World!' print("Hello, World!") """ This is a multi-line comment. You can write text on multiple lines, just like a regular string, but it will not be executed. """ print("Hello, World!") print("Hello, World!") # Display the string 'Hello, World!' |
Conclusion
In conclusion, comments play a vital role in improving the readability and understandability of your code. This tutorial demonstrated how to make single-line, multi-line, and inline comments in Python 3.
Always remember to describe your code adequately using comments, as it can help other developers understand your code more easily and make maintenance and collaboration more efficient.