operators such as -- or ++ are different than + or - (such as count-1 or count+1). + and - will change the value temporarily
, whereas -- and ++ will change the value of the variable permanently.
Also, there's something else going on here.
will behave differently than
would actually come out to read:
This is because of where the -- was placed. Placing it after
the variable will decrease the variable's value only after
the while loop's check has been made on the variable. So, the first run through the while loop will see count as equaling 3 and continue on through the loop, while quickly stopping to decrease count by 1. The next time through it will see count as 2, and the third time through it will see count as 1, thereby running the loop a third time. After the third iteration however, count becomes 0, which is why you'd see it output as I showed above.