金银花

while [ 1 ]doread -p "请输入一个数字:" necho $nif [ $n == "end" ]thenexit 0fidone

while [ 1 ]doread -p "请输入数字:" nif [ `echo $n|grep -E [^0-9]|wc -l` -gt 0 ]thenecho "输入的为非数字，请重新输入"elseecho "输入为纯数字，退出"exit 0fidone