"calculate the faculty of [1..8]: "ß{
REM faculty program in false and ploki
REM Lukas Mai, 11.09.2003
REM} [$1=$[\%1\]?~[$1-f;!*]?]f: ^'0-$$0>~\8>|$ {
LET n @LEGS(\EING)
REM}
"result: "ß{
IF n < 1 | (n > 8)
  REM} ~[\f;!.]?[
  "illegal input"ß{
ELSE
  LET f 1
  FOR loop IF n > 0
    LET f f * n
    LET n n - 1
    NEXT loop
  FI
  WUNT f
FI
REM} ]?"
"