shell中for语句的几种用法

用法1：

##

printf "example 1:\n"

for ((i = 0; i < 10; i++))

do

printf "${i} "

done

printf "\n\n"

 

执行结果：

example 1:

0 1 2 3 4 5 6 7 8 9

 

 

用法2：

##

printf "example 2:\n"

for i in $(seq 1 10)

do

printf "$i "

done

printf "\n\n"

 

执行结果：

example 2:

1 2 3 4 5 6 7 8 9 10

 

用法3：

##

printf "example 3:\n"

for i in {1..10}

do

printf "${i} "

done

printf "\n\n"

执行结果：

example 3:

1 2 3 4 5 6 7 8 9 10

 

用法4：

##

printf "loop in string\n"

printf "example 4:\n"

for i in `ls`

do

printf "${i} "

done

printf "\n\n"

 

执行结果：

example 4:

check_source.sh for.sh if.sh packet.sh readline.sh script shell1.sh shell.sh string_compare.sh svn.sh version_config.txt

 

 

用法5：

##

printf "example 5:\n"

for i in f1 f2 f3

do

printf "${i} "

done

printf "\n\n"

 

执行结果：

example 5:

f1 f2 f3