p=$PWD
mkdir /tmp/test_let
cd /tmp/test_let

let 240>420	; echo $?
let 241>=421	; echo $?
let 243<423	; echo $?
let 244<=424	; echo $?

printf "\n"
echo -n "ls :"
ls
printf "\n"

cd $p
rm -rfv /tmp/test_let