Different Suffixes

The first integer is prompted for outside of the loop. Inside the loop body, it would be nice to use the following prompts:

Enter the 2nd integer (enter 0 to quit):
Enter the 3rd integer (enter 0 to quit):
Enter the 4th integer (enter 0 to quit):
Enter the 5th integer (enter 0 to quit):
Enter the 6th integer (enter 0 to quit):
.... and so on ....
Enter the 20th integer (enter 0 to quit):
Enter the 21th integer (enter 0 to quit):

The prompt shows poor grammar for integers 21, 22, 23, 31, 32, 33 and so on. Let us regard this as acceptable.

The output statement is now:

System.out.println( "Enter the " + 
  (count+1) + suffix + " integer (enter 0 to quit):" );

The variable suffix will be a reference to one of the Strings: "nd", "rd", or "th".