Shell编程之循环_demo

#!/bin/bash#Program:#               This program shows "Hello World!" in your screen.#History#       2015/12/09 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/binexport PATH#whilewhile [ "$yn" != "yes" -a "$yn" != "YES" ]do        read -p "Please input yes/YES to stop this program : " yndone#untiluntil [ "$yn" == "yes" -o "$yn" == "YES" ]do        read -p "Please input yes/YES to stop this program : " yndone#forfor obj in dog cat moursedo        echo "name is : $obj"donenames="zhangsan:lisi:zhaoliu:wangwu"param=$(echo $names | sed 's/:/ /g')for obj in $paramdo        echo "name is : $obj"donefor obj in $(seq 1 10)do        echo "name is : $obj"dones=0for((i=0;i<=100;i++))do        s=$(($s+$i))doneecho "sum is : $s"##测试命令 sh [nvx] shn.sh##n:不执行仅检查语法##v:执行前打印到屏幕##x:将使用到的代码显示到屏幕。执行一步显示一步，调试必备