Understanding Functions in Python

Lesson 9 covers functions, arguments, and keyword arguments in Python. It explains how to define functions using the def statement, the importance of avoiding code duplication, and how to use arguments and parameters. The lesson also discusses return values, including the None type, and demonstrates the use of keyword arguments for optional parameters in functions like print.

What is a function in Python?

• A type of variable

• A built-in Python module

• A mini program within a program

• A large program that runs independently

Why is it important to avoid duplicating code?

• It allows for more complex code structures

• It makes the code easier to update and maintain

• It helps in reducing memory usage

• It makes the code run faster

What is the main purpose of defining functions in a program?

• To increase the program's execution speed

• To reduce the number of variables

• To make the program more complex

• To group code that is executed multiple times

What is the difference between an argument and a parameter?

• Arguments are variables, parameters are values

• Arguments are values passed to functions, parameters are variables in the function

• Parameters are values passed to functions, arguments are variables in the function

• There is no difference

What does the return statement do in a function?

• It calls another function

• It defines the function's parameters

• It specifies the output of the function

• It stops the function from executing

What is the None value in Python?

• A function in Python

• A type of error

• A placeholder for a missing value

• A type of string

What happens if a function does not have a return statement?

• It does not return anything

• It returns the value None

• It returns an error

• It returns the last evaluated expression

How can keyword arguments be used in functions?

• To return multiple values

• To define mandatory parameters

• To specify optional parameters

• To create new functions

What does the 'end' keyword argument do in the print function?

• It changes the string printed at the end

• It starts a new line after printing

• It specifies the end of the function

• It changes the separator between printed items

Which of the following is a correct use of the 'sep' keyword argument in the print function?

• print('Hello', 'World', sep='\n')

• print('Hello', 'World', sep='-')

• print('Hello', 'World', end='\n')

• print('Hello', 'World', end='-')