【shell编程】for循环
for..do..done用法
1. 例子:
#!/bin/bash
for((i=1;i<=10;i++));
do
echo $(expr $i \* 3 + 1);
done
2. 例子:
1. 格式1
#!/bin/bash
for i in $(seq 1 10)
do
echo $(expr $i \* 3 + 1);
done
2. 格式2:
#!/bin/bash
for i in $(seq 1 10); do
echo $(expr $i \* 3 + 1);
done
3. 例子:
#!/bin/bash
# 遍历数字 1 到 10
for i in {1..10}; do
echo "当前数字是 $i"
# 当数字等于 5 时退出循环
if [ $i -eq 5 ]; then
echo "找到了 5,退出循环"
break
fi
done
echo "循环结束"
4. 例子:
#!/bin/bash
awk 'BEGIN{for(i=1; i<=10; i++) print i}'
5. 例子:
#!/bin/bash
for file in /proc/*;
do
echo $file is file path \! ;
done
5. 例子:
#!/bin/bash
for file in $(ls *.sh)
do
echo $file is file path \! ;
done
6. 例子:
#!/bin/bash
for i in f1 f2 f3 ;
do
echo $i is appoint ;
done
7. 例子:
#!/bin/bash
for i in `ls`;
do
echo $i is file name\! ;
done