How to sort Float Values ?

NSMutableArray* floats = [[NSMutableArray alloc] initWithObjects:[NSNumber numberWithFloat:256.0], [NSNumber numberWithFloat:9.0], [NSNumber numberWithFloat:1.0], [NSNumber numberWithFloat:4.0], [NSNumber numberWithFloat:10.0], [NSNumber numberWithFloat:900.0], nil];
    
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"self" ascending:YES];

NSArray* sortedFloats = [floats sortedArrayUsingDescriptors:[NSArray arrayWithObject:sortDescriptor]];
    
    for (NSNumber* num in sortedFloats) {
        NSLog(@"%f", [num floatValue]);
    }