Python Comments

In programming, comments are sections of code that are not executed by the interpreter. They are primarily used by programmers to add explanations or notes within the code, making it easier to understand. Comments can help clarify complex code blocks or temporarily disable code for testing purposes.

Single-Line Comments

To create a single-line comment in Python, simply start the line with a #. Everything following the # on that line will be ignored during execution.

Example 1:

# This is a single-line comment
print("This line will be executed.")

Output:

This line will be executed.

Example 2:

print("Hello, World!")  # This prints a greeting to the user

Output:

Hello, World!

Example 3:

print("Learning Python!")  # This statement is visible
# print("This line won't run")

Output:

Learning Python!

Multi-Line Comments

For multi-line comments, you have two options: you can either use # at the beginning of each line or you can use a multi-line string, which is enclosed in triple quotes (""" or '''). While multi-line strings are typically used for documentation, they can also serve as comments.

Example 1: Using # for Each Line

# This is a multi-line comment
# explaining the purpose of the following code.
# It checks whether a number is positive or negative.
num = 5
if num > 0:
    print("The number is positive.")
else:
    print("The number is negative.")

Output:

The number is positive.

Example 2: Using a Multi-Line String

"""
This block of code checks the value of the variable.
If the variable is greater than 0, it will print that it is positive.
Otherwise, it will indicate that the number is negative.
"""
num = -3
if num > 0:
    print("The number is positive.")
else:
    print("The number is negative.")

Output:

The number is negative.

Conclusion

Comments are essential in Python programming as they help keep your code organized and understandable. By using single-line and multi-line comments effectively, you can enhance the readability of your code for yourself and others. So, remember to comment your code, and happy coding! 🎉

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