Project: Guess the number

Project: Guess the number

• The computer thinks of a number. You guess until you find it.
• After every wrong guess, it says Too low or Too high.
• You use input(), if / elif / else, and a while loop.

What you will build

3
Too low
9
Too high
7
Correct! You needed 3 guesses.

Step 1: one guess

• int(input()) turns the typed text into a number, so you can compare it.
• < means smaller than, > means bigger than.
• Use if / elif / else to choose one of the three messages.

Step 2: keep guessing

• A while loop repeats while its condition is true.
• != means is not equal to. So while guess != secret: repeats until the guess is right.
• Read the next guess inside the loop, or it will never end.

count = 3
while count != 0:
    print(count)
    count = count - 1
print("Go!")

Step 3: count the guesses

• Keep a counter variable. It starts at 1 for the first guess.
• Add 1 every time the loop reads another guess.
• str(guesses) turns the number into text, so you can join it with +.

Play for real

• A real game picks a secret number at random. Run this and play: type your guesses in the box.

import random
secret = random.randint(1, 10)
guess = int(input("Guess a number from 1 to 10: "))
while guess != secret:
    if guess < secret:
        print("Too low")
    else:
        print("Too high")
    guess = int(input("Try again: "))
print("Correct!")

Now build it

• Three steps. The checks use the secret 7, so the result is always the same.