making a basic multiplication program in python

Question

The goal of the program is for it to multiply two random numbers less than 12 and for the user to guess the answer. So far i have this . . .

import random
g=0
while g<10:
 variable_1 = random.randint (0,13)
 variable_2 = random.randint (0,13)
 answer = variable_1 * variable_2
 guess = input("What is 'variable_1' x 'variable_2'?")
 if guess == answer:
 print "Correct!"
 else:
 print "Incorrect!"

The problem is the input box literally says "What is Variable_1 x Variable_2?". But, i want it to have the value of the variables in the input box. Is there a way to do this?

• jfs: randrange(12) to select 0 <= x < 12. Your code also selects 12, 13 erroniously
• Joel Cornett: You don't increment g. Is this program supposed to loop infinitely?

Answer 1

Try this instead:

guess = input("What is %d x %d?" % (variable_1, variable_2))

• Maria Zverina: I don't think %i means anything. %d means decimal integer. The list of available types is at docs.python.org/library/string.html#formatspec
• jfs: use int(raw_input(...)) instead of input()
• Junuxx: @Maria: It does. You aren't using the format() syntax you linked to, which was introduced in Python 2.6, but the older string formatting syntax, in which %i is a 'signed integer decimal'. So is %d, but IMO that letter is more easily confused with 'double' or 'decimal'. I guess it's a matter of preference.

Answer 2

querystr="What is "+str(variable_1)+" x "+str(variable_2)+"?";

Then you can

guess=input(querystr);

Answer 3

from random import randint
def val(lo=1, hi=12):
 return randint(lo, hi)
def main():
 right = 0
 reps = 10
 for rep in range(reps):
 v1, v2 = val(), val()
 target = v1 * v2
 guess = int(raw_input("What is {} * {}?".format(v1, v2)))
 if guess==target:
 print("Very good!")
 right += 1
 else:
 print("Sorry - it was {}".format(target))
 print("You got {} / {} correct.".format(right, reps))