How do I round a NSNumber to zero decimal spaces

Question

How do I round an NSNumber to zero decimal spaces, in the following line it seems to keep the decimal spaces:

NSNumber holidayNightCount = [NSNumber numberWithDouble:sHolidayDuration.value];

Answer 1

Typically casting to int truncates. For example, 3.4 becomes 3 (as is desired), but 3.9 becomes 3 also. If this happens, add 0.5 before casting

int myInt = (int)(sHolidayDuration.value + 0.5);

Answer 2

Here's a bit of a long winded approach

float test = 1.9;
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setRoundingMode:NSNumberFormatterRoundHalfUp];
[formatter setMaximumFractionDigits:0];
NSLog(@"%@",[formatter  stringFromNumber:[NSNumber numberWithFloat:test]]);
[formatter release];