Check if Integer is Positive or Negative - Objective C

Hello,

How can I tell in objective-c coding if an integer is positive or negative. I'm doing this so that I can write an "if" statement stating that if this integer is positive then do this, and if its negative do this.

Thanks,

Kevin

From stackoverflow

• if (x >= 0)
  {
      // do positive stuff
  }
  else
  {
      // do negative stuff
  }
  

  If you want to treat the x == 0 case separately (since 0 is neither positive nor negative), then you can do it like this:

  if (x > 0)
  {
      // do positive stuff
  }
  else if (x == 0)
  {
      // do zero stuff
  }
  else
  {
      // do negative stuff
  }
  

  BlueRaja - Danny Pflughoeft : 0 is positive now? :)

  Deniz Acay : most mathematicians accept 0 as a positive value

  Eiko : Until they discover functions like log(x).

  Paul R : @BlueRaja - Danny Pflughoeft: well it doesn't have a `-` in front of if, so that's good enough for me. ;-)

  BlueRaja - Danny Pflughoeft : @Deniz: Mathematicians say 0 is a *non-negative* value; but it's not *positive*.

  Deniz Acay : @BlueRaja - Danny Pflughoeft: if...else statemens evaluate logical expressions as true/false, so for computer "if it is not negative, it is positive".

  Eiko : @Deniz Acay: Then please do a if(-1) printf("Wow I'm positive"); and fasten your seatbelts.... C takes everything != 0 as true.

  Deniz Acay : That's why i hate C :)

  JWWalker : @Deniz Acay: I've never heard of mathematicians accepting 0 as positive (and I used to be a math professor). Mathematicians use the word "nonnegative" all the time. They wouldn't need the word if it meant the same thing as "negative".

  Deniz Acay : Looks like i understood this "non-negative" word as "positive", so thanks for correction :)

• Maybe I am missing something and I don't understand the quesiton but isn't this just

  if(value >= 0)
  {
  }
  else
  {
  }
  

• -(void) tellTheSign:(int)aNumber
  {
     printf("The number is zero!\n");
     int test = 1/aNumber;
     printf("No wait... it is positive!\n");
     int test2 = 1/(aNumber - abs(aNumber));
     printf("Sorry again, it is negative!\n");
  }
  

  ;-)

  Seriously though, just use

  if (x < 0) {
  // ...
  } else if (x == 0) {
  // ...
  } else {
  // ...
  }
  

  Don't overdo methods ans properties and helper functions for trivial things.