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基于Shell中for循环的几个常用写法分享_linux shell_

2023-05-26 622人已围观

简介基于Shell中for循环的几个常用写法分享_linux shell_

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

 #!/bin/bash list="rootfs usr data data2" for i in $list; do echo $i is appoint ; done

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

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