This video introduces the concept of functions in Python, explaining their advantages such as code reusability and easier debugging. It covers how to create functions using the 'def' keyword, provides an example of calculating the area of a circle, and discusses the benefits of encapsulating code within functions. The video concludes with a summary and a preview of the next topic, which will cover arguments and parameters.

What is the primary purpose of a function in programming?

• To encapsulate code for specific tasks

• To manage memory

• To store data

• To create user interfaces

Which of the following is NOT an advantage of using functions?

• Simplified code maintenance

• Easier debugging

• Code reusability

• Increased memory usage

What is a key benefit of encapsulating code within a function?

• It hides the code from the user

• It allows for easier code sharing

• It prevents code from being reused

• It makes the code run faster

Which Python keyword is used to define a function?

• def

• define

• function

• func

Which of the following is an example of a built-in Python function?

• radius

• len

• calculate

• circle_area

What is the formula for the area of a circle?

• r²/π

• πd

• πr²

• 2πr

How does using a function help when calculating the area of circles with different radii?

• It reduces the need to remember the formula each time

• It requires more lines of code

• It makes the code less readable

• It increases the complexity of the code