4.1.1 Function Definition (def)

In Python, functions are defined using the def keyword.
A function definition creates a reusable piece of code that can be called multiple times.

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Function Structure

A function definition includes:

• The def keyword
• A function name
• Parentheses for parameters
• An indented block of code

The function body contains the statements executed when the function is called.

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Function Naming

• Function names should use snake_case
• Names should clearly describe the function’s purpose
• Python keywords must not be used as function names

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📌 Note:
Well-named functions improve code readability and maintainability.