iphone - Absolute value isn't working -


My iPhone has a line of code that looks like this: 

  Repeat Decimal 2 = abs (NewLocation.coordinate.longitude - degrees);   
 I am trying to make sure that the value of decimal 2 is always positive. However, the decimal 2 is currently -82.  
 Can anyone explain this? I'm not doing anything else the value of decimal 2  
 Thank you.   
 
 
 You  NSDecimalNumber    
 < P>, you can use the underlying function of the  NSDecimalNumber  class to compare the number to zero, then multiply -1 as an appropriate example:  
  - (NSDecimalNumber *) abs: (NSDecimalNumber *) num {if compare myNumber: [NSDecimalNumber zero]] == NSOrderedAscending) {// the number is negative. 1 by NSDC command number multiplied by negative number = [NSDCMNMR decimal decimal numberCommentation: 1 exponent: 0 is negative: yes]; Return [Number Decimal Decimal Numberality: Negative On]; } And {return number; }}   
 In this case, there is no loss of accuracy

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