Final Value of Variable After Performing Operations
Here’s a simple solution using a counter variable:


This code loops through the given operations. If the operation is an increment operation ("++X" or “X++”), we increment our counter X
by 1. If the operation is a decrement operation ("–X" or “X–”), we decrement X
by 1. Finally, we return the value of X
.
This code treats “++X” and “X++” as the same operation, and “–X” and “X–” as the same operation. This is because in Python and many other languages, there’s no difference between preincrement/postincrement or predecrement/postdecrement. The exact behavior can depend on the language, but for this problem, we assume they have the same effect.