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)
- expr $i \* 3 + 1
- done
输出:
- 4
- 7
- 10
- 13
- 16
- 19
- 22
- 25
- 28
- 31
- for1-2.sh
- #!/bin/bash
- for i in $(seq 1 10)
- do
- #echo $(expr $i \* 3 + 1)
- expr $i \* 3 + 1
- done
- for1-3.sh
- #!/bin/bash
- for i in {1..10}
- do
- expr $i \* 3 + 1
- done
- for1-4.sh
- #!/bin/bash
- awk 'BEGIN{for(i=1;i<=10;i++) print i*3+1}'
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 the file name\!
- done
- for2-3.sh
- #!/bin/bash
- for i in f1 f2 f3
- do
- echo $i is input arguments\!
- done
- for2-4.sh
- #!/bin/bash
- list="boot usr tmp opt"
- for i in $list
- do
- echo $i is appointed\!
- 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 f in $(ls *.sh)
- do
- echo $f is file path \!
- done
转载自: https://www.cnblogs.com/EasonJim/p/8315939.html
来源: http://www.bubuko.com/infodetail-3475148.html