Absolute Value (abs) of NSDecimalNumber without loss of precision

Question

I need to get the absolute value of an NSDecimalNumber without loss of precision. I can\'t seem to find a way to do this without converting to decimal or float (with a loss

Answer 1

If you do not want to multiply it, zero subtracting the value will do the trick.

- (NSDecimalNumber *)abs:(NSDecimalNumber *)num {
    if ([num compare:[NSDecimalNumber zero]] == NSOrderedAscending) {
        // negative value
        return [[NSDecimalNumber zero] decimalNumberBySubtracting:num];
    } else {
        return num;
    }
}