Need help to spot some slight error . - page 5

[William Roeder]

juniorlcq: let's say OrdersTotal() == 3 , with the count down for loop for ( int x = ( OrdersTotal() - 1 ) ; x >= 0 ; x-- ) , x will save the 1st value as 2 , then it will continue the for loop from 2 onwards without going through OrdersTotal() again ??	Yes. It does that wither you used x-- or --x. For and while are interchangeable. int x = OrdersTotal() - 1; // OT retrieved only once. while(x >= 0){   :   --x; } The difference is x-- retrieves the original value 2 after making x=1 before throwing the value away. (The value isn't used, unlike arr[x--])