A function in Python is a named block of code that performs a specific task. Functions allow programmers to reuse code, organize programs, and avoid repetition.
Defining a function
Python functions are defined using the def keyword:
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greetis the function name -
nameis a parameter -
The function returns a result
Call the function:
Why functions are important
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Reusability – Write once, use many times.
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Organized code – Makes programs modular and readable.
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Avoid repetition – No need to rewrite the same code multiple times.
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Easier debugging – Errors in functions can be fixed in one place.
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Supports parameters and return values – Enables flexible data processing.
Example
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Functions make your code cleaner, efficient, and easier to maintain.
