Week 8: Python Time to Guess

Review

• Mathematical operators
• Lists

Discussion

• While loops
  • Repeat a section of code an unknown number of times until a condition is met.
    
    while condition: statement(s)
    
  • We use for loops when we know exactly how many times we want to execute a block of code (i.e. 10 times to create a snowflake with 10 arms).
  • While loops are used when we don’t know how many times we will need to execute a task.
    • i.e. If we ask a user to guess a number between 1 and 10, we don’t know how many times they will guess incorrectly. So, we continue to ask the user to guess a number, while the number is not correct.
  • Infinite loops, when the condition is never false. This may crash a program, so you want the condition to become false at some point.
  • Using a while loop to receive correct input:
    • Ask the user for input
    • While the input is incorrect
    • Ask the user for another value
    • Go back to (2)
      

Lesson

Practice

• Create your own guessing game.
  • Ask the user for their name and introduce them to the game.
  • Use the while loop structure, taking input from the user and checking it against some condition.
  • Congratulate the user when they’ve won.
• Extend your guessing game. For example..
  • Ask the user for a difficulty level (easy – guess a number between 1 and 10; medium – 1 and 20; hard – 1 and 50)
    difficulty = input("Enter a level of difficulty - easy/medium/hard")
if difficulty == "easy": max = 10
elif difficulty == "medium": max = 20
elif difficulty == "hard": max = 50

number = random.randint(1, max)
    
  • ⦁ When the user guesses incorrectly, give them a hint by telling them whether their answer is too high or too low.