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iOS

Posted by Laurence Bowe
Laurence Bowe
6,222 Points

Objective-C Basics quiz/ operations & expressions HELP!

Hi I'm continually getting the question 3: Auto increment the variable named unstable:

int unstable = 25; unstable -= 5 which i believe to be 5

and question 4: Auto decrement the variable named unstable:

int unstable = 25; unstable -= 5; unstable++; plz help thx

3 Answers

John W
John W
21,558 Points

Auto-increment refers to the ++ operator, auto-decrement refers to the -- operator.

Hence, to auto-increment a variable somevariable, you would do somevariable++; This is equivalent to incrementing by 1, i.e. somevariable+=1

Similarly, to auto-decrement somevariable, you would do somevariable--; This is equivalent to decrementing by 1, i.e. somevariable-=1

For these questions, just append your code after what's already there.

Laurence Bowe
Laurence Bowe
6,222 Points
Laurence Bowe
Laurence Bowe
6,222 Points

THANKS SO MUCH!!!!!!!!!!!!!!!!!!!!!!!

Jakub Kusmierz
Jakub Kusmierz
6,808 Points
Jakub Kusmierz
Jakub Kusmierz
6,808 Points

The question is missing a semicolon following the second line of code. Since on the iPad the question is all presented inline, if somebody wants to enter it before the auto increment the answer will be counted as incorrect.

Here is how it appears on the iPad Treehouse app:

Auto increment the variable named unstable: int unstable = 25; unstable -= 5 _____