Return 1st from 1, 2nd from 2, ..., 11th from 11,

Question

Is there a Objective-c function to return a NSString * from a NSUInteger, i.e.:

• 1 -> 1st
• 2 -> 2nd
• ...
• 10 -> 10th
• 21 -> 21st
• ...
• 31 -> 31st

for the range from 1 to 31. Thanks!

Answer 1

- (NSString *)stringFromInt:(int)num {
    NSString stringAddition;
    if (num%100 >= 11 && num%100 <= 13) {
        stringAddition = @"th";
    }
    else {
        switch (num % 10) {
            case 1: stringAddition = @"st"; break;
            case 2: stringAddition = @"nd"; break;
            case 3: stringAddition = @"rd"; break;
            default: stringAddition = @"th"; break;
        }
    }
    return [NSString stringWithFormat:@"%i%@", num, stringAddition];
}

EDIT:
Fixed the 11, 12, 13 issue.