[Tutor] Will the following code ever exit?

Alan G alan.gauld at freenet.co.uk
Sat Sep 17 10:50:15 CEST 2005


> Will the following code ever exit, 

Yes, it will exit - with an error because it can never run.

def add(a,b):
    answer = a+b
    guess = float(raw_input(a," + ",b," = "))

You never return the answer so it dies when the function dies.

num1 = random.choice(range(1,10))
num2 = random.choice(range(1,10))

q = random.choice(range(15,31)
cq = 1
while cq >= q:

and cq is 1 and q is between 15,31 so cq will never be >= to q, 
the while loop will never execute.

    if guess != answer:

But if it did answer is not defined 9see comment above) 
so this will crash.

   print "Questions: ",q
   print "Correct: ",correct

And if it gets this far correct is not defined so again 
we get an error.

You need to return answer from the function and define 
correct/incorrect. Then turn the while test into a <=

Then it might start to run although not necessarily correctly.

Alan G.

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