This snippet shows you how to calculate the number e. Usage $e(N), where N is the precission. Also includes a fac alias that is used for the e calculation, but can also be used alone. NOTE: this is an example calculation

alias e {

  ; Alias for a calculation of e, requires N for precission, example:
  ; $e(5) or $e(10)
  ; If N = 10, it will already yield a very accurate result

  var %e = 0, %a = 0
  while (%a <= $$1) {
    %e = $calc(%e + (1 / $fac(%a)))
    inc %a
  }
  return %e
}

alias fac {

  ; Alias for fac-calculations, example:
  ; 2! = $fac(2)    10! = $fac(10)

  if (!$$1) return 1
  var %a = $abs($int($1)), %b = %a
  while $calc(%a - 1) {
    %b = $calc(%b * (%a - 1))
    dec %a
  }
  return $iif($$1 < 0,-) $+ %b
}