What Are Python Functions? | Why & How to Use Functions | Learn Python in 5 Minutes | STEM Toolkit
What are Python functions, why do we need them, and how do we use them?
In this lesson, we begin with a practical problem. After successfully analyzing and visualizing data for one student class, the teacher asks us to perform the same analysis for 50 different classes. Should we write the same code 50 times?
This is exactly the problem that Python functions were designed to solve.
You'll learn how functions help organize and reuse code, making your programs easier to write, understand, and maintain.
In this lesson you'll learn:
• What Python functions are
• Why Python functions are needed
• How to define a function
• How to call a function
• Function arguments
• Default argument values
• Multiple arguments
• Positional arguments
• Keyword arguments
• Common mistakes when calling functions
This lesson is part of the Learn Python series from SoftSentinel Academy, where we learn programming through practical STEM, data analysis, and real-world examples instead of isolated coding exercises.
In the next lesson, we'll continue exploring Python functions and discover how functions can do much more than simply execute a sequence of instructions.
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