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Chapter 7a - While Loop

While Loops​

While Loop

The BooleanExpression is tested, and if it is true, the Statement is executed. Then, the BooleanExpression is tested again. If it is true, the Statement is executed. This cycle repeats until the BooleanExpression is false.

  • Prints ``
continueProgram="y"


while (continueProgram == "y"):
  print("Hello!")
  continueProgram = input("Continue program? y/n").lower()[0]
  
print("Program Terminated")
🧪 Try the code out!

Reusable Adder​

The following program adds 2 numbers until the user tells it to stop

programFinished="yes"


while (programFinished == "yes"):

    n1 = int(input("Enter number 1"))
    n2 = int(input("Enter number 2"))
    print(n1+n2)
    programFinished = input("Enter Yes if you want to continue using the calculator or No otherwise").lower()
🧪 Try the code out!

Exercise​

These are used when we just want them to play around with the code first.

Practice
  • Create a program that prints your name in two lines until you type n
  • Use the following Canvas

🙋‍♀️ Example of an the expected Program

Turtle Example​