Linux下Shell的for循环语句 - EasonJim - 博客园

第一类:数字性循环
-----------------------------
for1-1.sh

!/bin/bash for((i=1;i<=10;i++)); do

echo $(expr $i \* 3 + 1); done

-----------------------------
for1-2.sh

!/bin/bash for i in $(seq 1 10) do

echo $(expr $i \* 3 + 1); done  

-----------------------------
for1-3.sh

!/bin/bash for i in {1..10} do

echo $(expr $i \* 3 + 1); done

-----------------------------
for1-4.sh

!/bin/bash awk 'BEGIN{for(i=1; i<=10; i++) print i}'

第二类:字符性循环
-----------------------------
for2-1.sh

!/bin/bash for i in ls; do

echo $i is file name\! ; done  

-----------------------------
for2-2.sh

!/bin/bash for i in $* ; do

echo $i is input chart\! ; done

-----------------------------
for2-3.sh

!/bin/bash for i in f1 f2 f3 ; do

echo $i is appoint ; done

-----------------------------
for2-4.sh

复制代码; "复制代码")

!/bin/bash

list="rootfs usr data data2"
for i in $list; do
echo $i is appoint ; done

复制代码; "复制代码")

第三类:路径查找
-----------------------------
for3-1.sh

!/bin/bash for file in /proc/*;

do
echo $file is file path \! ;
done

-----------------------------
for3-2.sh

!/bin/bash for file in $(ls *.sh) do

echo $file is file path \! ; done

总结:

现在一般都使用for in结构,for in结构后面可以使用函数来构造范围,比如$()、``这些,里面写一些查找的语法,比如ls test*,那么遍历之后就是输出文件名了。

参考:

http://blog.csdn.net/babyfish13/article/details/52981110(以上内容转自此篇文章)


Original url: Access
Created at: 2019-12-10 20:57:56
Category: default
Tags: none

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