Python Functions Exercises With Answers

Which keyword defines a function in Python?

1. function
2. lambda
3. func
4. defcorrect

Answer: def

Why: A function definition starts with def, followed by its name and parameters.

What does return do inside a function?

1. Sends a value back to the callercorrect
2. Stops the whole program
3. Prints a value
4. Creates a new variable

Answer: Sends a value back to the caller

Why: return ends the function and gives its result to the caller.

Which definition gives name a default value?

1. def greet("friend"=name):
2. def greet(name) default "friend":
3. def greet(name): = "friend"
4. def greet(name="friend"):correct

Answer: def greet(name="friend"):

Why: A default value follows an equals sign in the parameter list.

What does a function with no return statement return?

1. An empty string
2. 0
3. It raises an error
4. Nonecorrect

Answer: None

Why: If a function reaches the end without return, Python returns None.

Complete the keyword that starts the function definition.

____ add(a, b):
    return a + b

Answer: def

Why: def introduces a function definition.

Complete the expression so add returns a plus b.

def add(a, b):
    return a ____ b

Answer: +

Why: The addition operator combines the two parameters.

Complete the default value so greet() says Hi friend.

def greet(name="____"):
    return f"Hi {name}"

Answer: friend

Why: The default is used when the caller does not supply a name.

Complete the expression so the function result is printed.

result = add(2, 3)
print(____)

Answer: result

Why: The variable result holds the value returned by add.

What is the output?

def add(a, b):
    return a + b
print(add(2, 3))

Answer: 5

Why: The function returns 5, then print displays it.

What does this code print?

def greet(name="Maya"):
    return f"Hi {name}"
print(greet())

Answer: Hi Maya

Why: The default name Maya is used when no argument is passed.

What does the program output?

def square(n):
    return n * n
print(square(4))

Answer: 16

Why: 4 squared is 16.

What appears on the screen?

def no_return():
    pass
print(no_return())

Answer: None

Why: A function without a return value produces None.