while(1)/10.
while 1 what? There is no god damn difference from 1 to 1 so it will always be 1. So the highest the person could get is 1 and lowest is 0 but in the case that you used a while loop incorrectly, it is only going to be 1. A more correct use is while(x <= Y). Usually logic comparisons.
Edit: for not even knowing the correct use of a while loop, 0/while(1==1) return.
For the above poster -1/100,000