This doesn\'t work in perl : for(10...0) It essentially doesn\'t loop even once, because it checks that 10>0 initially.
for(10...0)
10>0
Any alternate s
for (map -$_,-10..0) { ... } for (map 10-$_,0..10) { ... }
If any part of the range is negative, then the first one is shorter than using reverse.
reverse