NORMAL MODE IS INTEGER

          R   CALCULATE FACTORIAL OF N
            INTERNAL FUNCTION(N)
            ENTRY TO FACT.
            RES = 1
            THROUGH FACMUL, FOR MUL = 2, 1, MUL.G.N
FACMUL      RES = RES * MUL
            FUNCTION RETURN RES
            END OF FUNCTION

          R   USE THE FUNCTION TO PRINT 0! THROUGH 12!
            VECTOR VALUES FMT = $I2,6H ! IS ,I9*$
            THROUGH PRNFAC, FOR NUM = 0, 1, NUM.G.12
PRNFAC      PRINT FORMAT FMT, NUM, FACT.(NUM)

            END OF PROGRAM