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![Linus Karlsson](https://secure.gravatar.com/avatar/b050a4cfdc640eb91214d6f5e81e6d2c?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Linus Karlsson
7,402 PointsQuestions 3 and 4?
Hi,
I'm stuck on questions number 3 and 4, does anybody know what they are after? Please don't give me the answer, but hint at it if u can.
Thank you in advance!
Linus.
3 Answers
![Stone Preston](https://secure.gravatar.com/avatar/c2b2872f48c222732218df9be85e1ed2?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Stone Preston
42,016 Pointsyou auto increment variables in objective c using the ++
operator. you auto decrement using the --
operator. make sure you are including semicolons at the end of your statement
![Linus Karlsson](https://secure.gravatar.com/avatar/b050a4cfdc640eb91214d6f5e81e6d2c?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Linus Karlsson
7,402 PointsThank u so much, Stone! I almost tore my hair off trying to figure it out...
![Stone Preston](https://secure.gravatar.com/avatar/c2b2872f48c222732218df9be85e1ed2?s=60&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Stone Preston
42,016 Pointsno problem. number 4 is tricky since the line above uses the shorthand arithmetic operators += or -= which is similar to autoincrement. but they are looking for ++. not +=
![Linus Karlsson](https://secure.gravatar.com/avatar/b050a4cfdc640eb91214d6f5e81e6d2c?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Linus Karlsson
7,402 PointsYes, it was. I thought they wanted me to type what the result of 25 + 5 was, or something like that