5.10.1: Functions and Parameters Quiz

In the following code: size = 20 x = 200 y = 300 ball = Circle(size) circle.set_position(x, y) What is the meaning of the x variable?

• The x coordinate of the left side of a box that would hold the circle

• The x coordinate of the right edge of the circle

• The radius of the circle

• The x position of the center circle

The following program should draw a circle on the screen def draw_circle(x, y): circle = Circle(100) circle.set_position(x, y) But when we run this code, we don’t see the circle. What is missing?

• Since we are trying to create a circle, we need to use the create_circle command.

• The code will have an error since you need to define the color.

• You need to add the circle with the circle.add() command.

• You need to add the circle with the add(circle) command.

We want to position a Circle on our screen to be at a random position, but we want to keep the entire shape on the screen. Which of the following will accomplish this given the following function? (Assume SIZE, HEIGHT, and WIDTH are properly defined) def draw_circle(x, y, radius): circle = Circle(radius) circle.set_position(x, y) add(circle)

• x = random.randint(0, HEIGHT) y = random.randint(0, WIDTH) draw_circle(x, y, SIZE)

• x = random.randint(SIZE, WIDTH - SIZE) y = random.randint(SIZE, HEIGHT - SIZE) draw_circle(x, y, SIZE)

• x = random.randint(0, HEIGHT) y = random.randint(0, WIDTH) draw_circle(SIZE, y, SIZE)

• x = random.randint(HEIGHT, SIZE) y = random.randint(WIDTH, SIZE) draw_circle(x, y, SIZE)

Why do we write functions? I. Make our code easier to understand by giving a readable name to a group of instructions II. Avoid writing repeated code III. Make our code reusable

• I and III

• I only

• I and II

• I, II, and III

In the following function print_three_times: def print_three_times(word): print(word) print(word) print(word) What is the parameter of the function?

• print_three_times

• def

• print

• word

What is the output of the following program? def sum_to(num): sum = 0 for i in range(num + 1): sum = sum + i return sum x = 5 sum_to(x) print(x)

• 5

• 15

What is printed by the following program? def print_numbers(two, one, zero): print(two) print(one) print(zero) zero = 1 one = 0 two = 2 print_numbers(zero, one, two)

• 2 1 0

• 0 1 2

• ZERO ONE TWO

• two one zero

How many parameters go into the function sum, and how many return values come out of the function sum? def sum(first, second, third): result = first + second + third print(first) print(second) print(third) return result

• 3 parameters go in, 1 return value comes out

• 3 parameters go in, 3 return values come out

• 1 parameter goes in, 4 return values come out

• 1 parameter goes in, 1 return value comes out

“It’s a bird! It’s a plane! No, it’s Superman!” We want to write a function is_superman that takes in two parameters is_bird and is_plane and returns True if it is in fact Superman, and False otherwise. If it’s not a bird and not a plane, it must be Superman. Which of the following functions is the correct implementation of is_superman?

• def is_superman(is_bird, is_plane): return is_bird or is_plane

• def is_superman(is_bird, is_plane): return not is_bird and not is_plane

• def is_superman(is_bird, is_plane): return not is_bird or not is_plane

What is printed by the following program? def product(x, y): return x * y def difference(x, y): return x - y x = 3 y = 8 value1 = product(x, y) value2 = difference(x, y) result = difference(value1, value2) print(result)

• 7

• -7

• 13

• -13