done is a Boolean variable and True is the sentinel value.
Add code for the Intro menu item when the user selects I.
Using a while loop, print your name 5 times.
intro.py
done = False
while not done:
print("Menu")
print("I - Intro")
print("Q - Quit")
choice = input("Choice: ")
if choice == "I":
print("Introductory Problem")
x = 0
name = input("What's your name? ")
while x < 5:
print(name)
elif choice == "Q":
print("Exiting Menu!")
done = True
for loop
Previously, you used while loops to iterate over a range of integer values. Now you will use a for loop with the range function with one argument.
Programmers usexorias a stepper variable.
Examples
Example 1
Add a Menu Item E1 - Example 1
Using a for loop, print your name 5 times.
example1.py
done = False
while not done:
print("Menu")
print("I - Intro")
print("Q - Quit")
choice = input("Choice: ")
if choice == "I":
print("Introductory Problem")
x = 0
name = input("What's your name? ")
while x < 5:
print(name)
elif choice == "Q":
print("Exiting Menu!")
done = True
elif choice == "E1":
print("Example 1")
name = input("What is your name? ")
for i in range(5):
print(name)
Example 2
Add a Menu Item E2 - Example 2
Using a for loop, print numbers from 0 to 4.
example2.py
done = False
while not done:
print("Menu")
print("S - Start")
print("E2 - Example 2")
print("Q - Quit")
choice = input("Choice: ")
if choice == "S":
print("Starting Game!")
elif choice == "Q":
print("Exiting Menu!")
done = True
elif choice == "E2":
print("Example 2")
for i in range(5):
print(i)
Example 3
Add a Menu Item E3 - Example 3
Using a for loop, ask the user for 3 numbers. Print the sum of numbers.
Initialize the variable sum to 0.
example3.py
done = False
while not done:
print("Menu")
print("S - Start")
print("E3 - Example 3")
print("Q - Quit")
choice = input("Choice: ")
if choice == "S":
print("Starting Game!")
elif choice == "Q":
print("Exiting Menu!")
done = True
elif choice == "E3":
print("Example 3")
sum = 0
for i in range(3):
num = int(input("Number: "))
sum = sum + num
print(sum)
Example 4
Add a Menu Item E4 - Example 4
Using a for loop, create the table to show the numbers 0 to 10 and their squares. Create a header:
print("Number\tSquared")
example4.py
done = False
while not done:
print("Menu")
print("S - Start")
print("E4 - Example 4")
print("Q - Quit")
choice = input("Choice: ")
if choice == "S":
print("Starting Game!")
elif choice == "Q":
print("Exiting Menu!")
done = True
elif choice == "E4":
print("Number\tSquared")
for i in range(11):
print(i,"\t",i**2)
Conclusion
In your own words, what is a for loop?
What are the differences between a while loop and a for loop.
