1 2 3 .s-simple cr : test-case ( n -- ) case 0 of ." zero" endof 1 of ." one" endof ." something else" endcase cr ; see test-case .( You should see [3] 1 2 3 -> ) .s-simple .( <-) cr .( You should see "zero": ) 0 test-case .( You should see "one": ) 1 test-case .( You should see "something else": ) 324 test-case .( You should still see [3] 1 2 3 -> ) .s-simple .( <-) cr : test-case-2 ( n -- ) case 0 of ." zero" fallthrough 1 of ." one" endof 2 of ." two" fallthrough ." something else" endcase cr ; see test-case-2 cr .( You should once more see [3] 1 2 3 -> ) .s-simple .( <-) cr .( You should see "zeroone": ) 0 test-case-2 .( You should see "one": ) 1 test-case-2 .( You should see "two": ) 2 test-case-2 .( You should see "something else": ) 324 test-case-2 .( You should still see [3] 1 2 3 -> ) .s-simple .( <-) cr bye