Linux的for循環語句

文章目錄

• ​​第一類：數字性循環​​
• ​​第二類：字元性循環​​
• ​​第三類：路徑查找​​
• ​​總結​​

第一類：數字性循環

#!/bin/bash  
  
for((i=1;i<=10;i++));  
do   
echo $(expr $i \* 3 + 1);  
done      

#!/bin/bash  
  
for i in $(seq 1 10)  
do   
echo $(expr $i \* 3 + 1);  
done      

#!/bin/bash  
  
for i in {1..10}  
do  
echo $(expr $i \* 3 + 1);  
done      

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

第二類：字元性循環

#!/bin/bash  
  
for i in `ls`;  
do   
echo $i is file name\! ;  
done      

#!/bin/bash  
  
for i in $* ;  
do  
echo $i is input chart\! ;  
done      

#!/bin/bash  
  
for i in f1 f2 f3 ;  
do  
echo $i is appoint ;  
done      

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

第三類：路徑查找

#!/bin/bash  
  
for file in /proc/*;  
do  
echo $file is file path \! ;  
done      

#!/bin/bash  
  
for file in $(ls *.sh)  
do  
echo $file is file path \! ;  
done      

總結