Linux shell编程第七篇select语句

select语句结构：
select 变量 in 选项1 选项2 ;do
break
done


例如：for循环里嵌套一个 select语句
#!/bin/sh
for((i=1;i < 3;i=$[$i+1])); do 
echo "What is your favourite OS?"
select var in "Linux" "Cnu Hurd" "Free BSD" "Other";do
break
done
echo "You have selected $var"
done