// a simple factorial program

// (including a tail recursive version)

def fact(n) =

  if n == 0 then 1 else n * fact(n - 1);

def facT(n, acc) =

  if n == 0 then acc else facT(n - 1, n * acc);

def facTi(n) = facT(n, 1);

//fact(10)

//facTi(10)

write(facTi(6))