[thirdparty/bash.git] / examples / functions / fact

# Who said shells can't use recursion?  Here is a factorial function.
# You call it with a number as an argument, and it returns the factorial
# of that number.

fact ()
{
    local num=$1;
    if [ "$num" = 1 ] ; then
        echo 1
        return ;
    fi;
    echo $(( $num * $(fact $(( $num - 1 )) ) ))
}
Commit	Line	Data
726f6388 JA	1	# Who said shells can't use recursion? Here is a factorial function.
	2	# You call it with a number as an argument, and it returns the factorial
	3	# of that number.
	4
	5	fact ()
	6	{
	7	local num=$1;
	8	if [ "$num" = 1 ] ; then
	9	echo 1
	10	return ;
	11	fi;
28ef6c31	12	echo $(( $num * $(fact $(( $num - 1 )) ) ))
726f6388	13	}