Let's use while
loops to create a guessing game.
The Challenge:
Write a program that picks a random integer from 1 to 100, and has players guess the number. The rules are:
Note: random.randint(a,b)
returns a random integer in range [a, b]
, including both end points.
import random
num = random.randint(1,100)
print("WELCOME TO GUESS ME!")
print("I'm thinking of a number between 1 and 100")
print("If your guess is more than 10 away from my number, I'll tell you you're COLD")
print("If your guess is within 10 of my number, I'll tell you you're WARM")
print("If your guess is farther than your most recent guess, I'll say you're getting COLDER")
print("If your guess is closer than your most recent guess, I'll say you're getting WARMER")
print("LET'S PLAY!")
WELCOME TO GUESS ME! I'm thinking of a number between 1 and 100 If your guess is more than 10 away from my number, I'll tell you you're COLD If your guess is within 10 of my number, I'll tell you you're WARM If your guess is farther than your most recent guess, I'll say you're getting COLDER If your guess is closer than your most recent guess, I'll say you're getting WARMER LET'S PLAY!
Hint: zero is a good placeholder value. It's useful because it evaluates to "False"
guesses = [0]
while
loop that asks for a valid guess. Test it a few times to make sure it works.¶while True:
guess = int(input("I'm thinking of a number between 1 and 100.\n What is your guess? "))
if guess < 1 or guess > 100:
print('OUT OF BOUNDS! Please try again: ')
continue
break
I'm thinking of a number between 1 and 100. What is your guess? 500 OUT OF BOUNDS! Please try again: I'm thinking of a number between 1 and 100. What is your guess? 50
while
loop that compares the player's guess to our number. If the player guesses correctly, break from the loop. Otherwise, tell the player if they're warmer or colder, and continue asking for guesses.¶Some hints:
abs()
function to find the positive difference between two numbersguesses[-2]
while True:
# we can copy the code from above to take an input
guess = int(input("I'm thinking of a number between 1 and 100.\n What is your guess? "))
if guess < 1 or guess > 100:
print('OUT OF BOUNDS! Please try again: ')
continue
# here we compare the player's guess to our number
if guess == num:
print(f'CONGRATULATIONS, YOU GUESSED IT IN ONLY {len(guesses)} GUESSES!!')
break
# if guess is incorrect, add guess to the list
guesses.append(guess)
# when testing the first guess, guesses[-2]==0, which evaluates to False
# and brings us down to the second section
if guesses[-2]:
if abs(num-guess) < abs(num-guesses[-2]):
print('WARMER!')
else:
print('COLDER!')
else:
if abs(num-guess) <= 10:
print('WARM!')
else:
print('COLD!')
I'm thinking of a number between 1 and 100. What is your guess? 50 COLD! I'm thinking of a number between 1 and 100. What is your guess? 75 WARMER! I'm thinking of a number between 1 and 100. What is your guess? 85 WARMER! I'm thinking of a number between 1 and 100. What is your guess? 92 COLDER! I'm thinking of a number between 1 and 100. What is your guess? 80 WARMER! I'm thinking of a number between 1 and 100. What is your guess? 78 COLDER! I'm thinking of a number between 1 and 100. What is your guess? 82 WARMER! I'm thinking of a number between 1 and 100. What is your guess? 83 COLDER! I'm thinking of a number between 1 and 100. What is your guess? 81 CONGRATULATIONS, YOU GUESSED IT IN ONLY 9 GUESSES!!
That's it! You've just programmed your first game!
In the next section we'll learn how to turn some of these repetitive actions into functions that can be called whenever we need them.