Chapter 6 Exercises¶

1. There are errors in the indention in the following code. Fix it to work correctly without errors.

   def square(turtle): turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) from turtle import * # use the turtle library space = Screen() # create a turtle screen malik = Turtle() # create a turtle named malik square(malik) # draw a square with malik

2. Fix the errors so it runs and returns the perimeter of a rectangle.

   def rec_perimeter(length, width) perimeter = 2 * (length + width) Return rec_perimeter print(rec_perimeter(2,4))

3. There are 2 syntax errors in the following code. Fix the errors so that it runs.

   def square(turtle) turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) from turtle import * # use the turtle library space = Screen() # create a turtle screen malik = Turtle() # create a turtle named malik square() # draw a square with malik

4. Fix the errors so the code runs and returns the area of a square.

   x = square_area(5) Def square_area(side_length): area = length * length return area print(x)

5. The following code has 4 syntax errors. Fix the errors so that the code runs.

   def square(turtle,size): turtle.forward(size) turtle.right(90) turtle.forward(size) turtle.right(90) turtle.forward(size) turtle.right(90) turtle.forward(size) turtle.right(90) from turtle import * # use the turtle library space = Screen() # create a turtle screen (space) malik = Turtle() # create a turtle named malik square(Malik, 100) # draw a square of size 100 square(Malik, 75) # draw a square of size 75 square(Malik, 50) # draw a square of size 50 square(Malik, 25) # draw a square of size 25

6. Change the code to take 3 parameters, a turtle, a size that tells it how far to go, and an angle it tells the turtle to turn.

   def move(turtle): turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) from turtle import * space = Screen() t = Turtle() move(t, 100, 90)

7. The following code has three lines that need to be changed. Fix the code to run correctly.

   def square(turtle,size): turtle.forward(size) turtle.right(90) turtle.forward(size) turtle.right(90) turtle.forward(size) turtle.right(90) turtle.forward(size) turtle.right(90) from turtle import * # use the turtle library space = Screen() # create a turtle screen (space) malik = Turtle() # create a turtle named malik square(100, malik) # draw a square of size 100 square(malik) # draw a square of size 75 square(50) # draw a square of size 50 square(malik, 25) # draw a square of size 25

8. Fix the errors so it prints "My name is John and I am 18 years old".

   def name_and_age(name_string, age_int): print(My name is "name_string" and I am + "str(age_int)" + years old) print(name_and_age(18, "John"))

9. Change the square procedure below to take a size parameter and have the turtle go forward by the specified size each time.

   def square(turtle): turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) turtle.forward(100) turtle.right(90) from turtle import * # use the turtle library space = Screen() # create a turtle screen malik = Turtle() # create a turtle named malik square(malik) # draw a square with malik

10. Change the code so the function takes parameters for the base and height of the triangle. Then, write code to call the function and print the result.

    def area_triangle(): base = 5 height = 4 return (5 * 4) / 2

11. Change the code below to create a function that calculates the cost of a trip. It should take the miles, miles_per_gallon, and price_per_gallon as parameters and should return the cost of the trip.

    miles = 500 miles_per_gallon = 26 num_gallons = miles / miles_per_gallon price_per_gallon = 3.45 total = num_gallons * price_per_gallon print(total)

12. Fix the errors in the procedure and call it.

    from turtle import * space = Screen() t = Turtle() t2 = Turtle() turtle_drawing(t, t2, 100, 45) turtle_drawing def(turtle1, turtle2, distance, angle) turtle1.left(angle) turtle2.right(angle) turtle1.forward(turtle2) turtle2.forward(turtle) return distance

13. Change the code below to create a function to return the number of miles you can drive. It will take as input (parameters) the tank_capacity, the_amount_left, and the miles_per_gallon.

    tank_capacity = 10 amount_left = 0.25 num_gallons = tank_capacity * amount_left miles_per_gallon = 32 num_miles = num_gallons * miles_per_gallon print(num_miles)

14. Complete and change the code to be a function with 2 parameters that returns the time taken to travel and call the function

    speed = 5 distance = 25 travel_time = print(travel_time)

15. Create a procedure to draw a rectangle and call it. Be sure to take the width and height of the rectangle as input to the procedure.

16. Create a procedure that takes 2 parameters, a string that you get from a user input and an int. Make the procedure print the string the number of times the int parameter gives and call the procedure.

17. Create a procedure to draw a triangle and call it. Be sure to take the length of each side of the triangle as input to the procedure.

18. Create a procedure that takes 7 paramters (turtle, distance, angle, and 4 color strings) and call the procedure to draw a square in 4 different colors.

19. Write the code below to create a procedure that prints a mad lib. You can ask the user for input and then pass that input into the procedure.

20. Write a function that takes the current hour, current minute, an int to be added to the current hour, and an int to be added to the current minute, and return a string with the new hour and minute (standard 12 hour time; if minutes exceed 60, it should go to the hour) and call the function.