一、判断结构
if判断结构
if expression; then
command1
command2
fi
if/else判断结构
if expression; then
command
else
command
fi
if/elif/else判读结构
if expression; then
command
elif expression; then
command
elif expression; then
command
…
fi
case结构
case VAR in
var1) command1 ;;
var2) command2 ;;
…
*)command ;;
esac
二、循环结构
1、for循环
for variable in(list)
do
command
done
2、类C的for循环
for((expression1;expression2;expression3))
do
command
done
3、while循环
while expression
do
command
done
4、until循环
until expression
do
command
done
5、select循环
select MENU in (list)
do
command
done
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原文:http://poseidon2011.blog.51cto.com/7553825/1902364