switchはテクニックを使う

    for (int i=0;i<100;i++) {
        switch (i) {
        case 1 ... 10:
            NSLog(@"case 1 ... 10: = %d",i);
            break;
        case 11 ... 50:
             NSLog(@"case 11 ... 50: = %d",i);
            break;
        case 51 ... 100:
             NSLog(@"case 51 ... 100: = %d",i);
            break;
        }
    }