#!/bin/bash
#循环判断的脚本

while true ; do
    read -p "input string:" var; 

    if [ -z $var ];then
        echo "输入不能为空"
    elif [[ ! $var =~ ^[a-z\|A-Z]+$ ]];then
        echo "输入的不是字母，请重新输入！"
    else
        #当满足输入条件时，跳出所有循环
        break; 
             
    fi
done

echo "验证$var"
sleep 10
exit 0


