sub fact{
(map{$_[0]*=$_}1..$_[0]-1)[-1]||1 # 33
# only 30 char for numbers bigger than 1
# (map{$_[0]*=$_}1..$_[0]-1)[-1]
}
L*
PS some solutions above fails with the number zero that must return 1
PPS in addition, negatives numbers must return undef or Error
perl -e "sub fact{$x=$_;$x<0?'E':(map{$x*=$_}1..$x-1)[-1]||1} print ma
+p{fact($_),qq(\n)}@ARGV " 0 1 3 -1
1
1
6
E
There are no rules, there are no thumbs..
Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.
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