1 dnl @ ../doc/m4.texi:4957: Origin of test
2 dnl @ expected status: 0
4 dnl @ Copyright (C) 2006, 2007, 2008, 2009 Free Software
6 dnl @ This file is free software; the Free Software Foundation
7 dnl @ gives unlimited permission to copy and/or distribute it
8 dnl @ with or without modifications, as long as this notice
10 define(`f', `ifelse(`$1', `0', `Answer: 0!=1
11 ', eval(`$1>1'), `0', `Answer: $2$1=eval(`$2$1')
12 ', `m4wrap(`f(decr(`$1'), `$2$1*')')')')
16 dnl @result{}Answer: 10*9*8*7*6*5*4*3*2*1=3628800