Shell脚本用for循环遍历参数的方法技巧_linux shell_

 #!/bin/bash number=65 #定义一个退出值 index=1 #定义一个计数器 if [ -z "$1" ];then #对用户输入的参数做判断，如果未输入参数则返回脚本的用法并退出，退出值65 echo "Usage:$0 + canshu" exit $number fi echo "listing args with \$*:" #在屏幕输入，在$*中遍历参数 for arg in $* do echo "arg: $index = $arg" let index+=1 done echo index=1 #将计数器重新设置为1 echo "listing args with \"\$@\":" #在"$@"中遍历参数 for arg in "$@" do echo "arg: $index = $arg" let index+=1 done

 #!/bin/bash number=11 if [ $# -eq 0 ];then echo "Usage: $0 + canshu" exit $number fi for i in $* #在$*中遍历参数，此时每个参数都是独立的，会遍历$#次 do echo $i done echo for i in "$*" #在"$*"中遍历参数，此时"$*"被扩展为包含所有位置参数的单个字符串，只遍历一次 do echo $i done

 #!/bin/bash number=11 if [ $# -eq 0 ];then echo "Usage: $0 + canshu" exit $number fi for i in $@ do echo $i done echo for i in "$@" do echo $i done