One of the many scripting constructs is the loop. A loop is a section of code that picks up data or generates data and then performs some operation on the data and then begins the process over again until some condition is met, the script is disrupted, or when input data is exhausted. ...
使用break退出循环：fori in{1..10}doif[$i-eq5]thenbreakfiecho"Number:$i"done 使用continue跳过...
shell linux 游戏 while循环 转载 浪人小风光 9月前 24阅读 linuxshell脚本while 红帽是一家世界领先的企业Linux解决方案提供商,其旗下的Red Hat Enterprise Linux(RHEL)是被广泛应用于企业服务器和工作站的操作系统。与此同时,LinuxShell脚本被广泛用于自动化任务、批处理和系统管理。在Shell脚本中,while循环是一种...
Android shell脚本while循环 shell脚本中的while循环 最后要介绍的是 shell script 设计中常见的"循环"(loop)。所谓的 loop 就是 script 中的一段在一定条件下反复执行的代码。 bash shell 中常用的 loop 有如下三种: * for * while * until for loop 是从一个清单列表中读进变量值,并"依次"的循环执行do...
Shell编程中循环命令用于特定条件下决定某些语句重复执行的控制方式,有三种常用的循环语句:for、while和until。while循环和for循环属于“当型循环”,而until属于“直到型循环”。循环控制符:break和continue控制流程转向。 参考:《Linux 与unix shell 编程指南》 ...
Explanation of the above shell script The true keyword turns the while loop into an infinite loop sincethe exit statusor condition to be checked by the while loop will always literally be true. This is followed by the “; operator” which is useful toconcatenating/chaining commands in Linux/...
breakexits from afor,select,while, oruntilloop in a shell script. Ifnumberis given,breakexits from the given number of enclosing loops. The default value ofnumberis1. Usage Notes This is a special built-in command of the shell. Exit Values ...
[me@linuxbox~]$while-count12345Finished. The syntax of thewhilecommand is: while 命令的语法是: whilecommands;docommands;done Likeif,whileevaluates the exit status of a list of commands. As long as the exit statusis zero, it performs the commands inside the loop. In the script above, the...
三、shell编程中while与for的区别: shell编程中常用的循环:while 和 for,在使用的过程中,会发现一些差别。 1. 代码 1 #!/bin/bash 2 3 # while loop 4 echo -en "\t";date 5 cat abc.txt|while read user ip 6 do 7 { 8 ssh -o ConnectTimeout=10 $user@$ip "hostname" < /dev/null ...
When executed, this script displays the following: 当执行的时候,这个脚本显示如下信息: 代码语言:javascript 复制 [me@linuxbox~]$while-count12345Finished. The syntax of thewhilecommand is: while 命令的语法是: 代码语言:javascript 复制 whilecommands;docommands;done ...