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iOS Objective-C Basics (Retired) Pointers and Memory Pointer Power

Auto increment syntax

In Douglas Turner's Arrays, Length and Size video, he auto increments the variable 'letter' like this: ++letter. Is that the same as letter++? Must the ++ be in front of the the variable name?

1 Answer

Stone Preston
Stone Preston
42,016 Points

they are not the same

++variable means that the variable is incremented by one and the new value is returned. variable++ means that the variable is incremented by one and the old value is returned:

int i = 5;
i = ++i; // i is incremented and new value is returned. now i = 6

int j = 5;
i = j++; // i is now 5. the value of j before the increment is returned and then j is incremented after the assignment so j is now 6

Thanks, Stone. Got it.