Need help making an infinite loop

while (1) {
    printf("Do you want to run this again? (Y/N) ");
    ch = getch();
    if (ch == 'N' || ch == 'n')
        break;
    else if (ch == 'Y' || ch == 'y') {
        .... your code comes here
    }
    else 
        printf ("Dammit! I said type Y or N\n");
}

char ch='J';
while (ch=='j'||ch=='J') {
  ... run code ...
  do {
    printf("Do you want to run this again? (Y/N) ");
    ch = getch();
  } while (ch!='J' && ch!='j' && ch!='n' && ch!='N');
}