In a shell script, aforloop allows you to iterate over a set of values or a range of numbers. Here are a few examples of how to useforloops in different contexts: Example 1: Iterating Over a List of Values #!/bin/bash # List of values for item in apple banana cherry do echo "...
forloopinabc def wer do echo"$loop" done 输出结果: abc def wer 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
Shell脚本中for循环的语法结构是什么? 如何在shell脚本中使用while循环? until循环在shell脚本中的作用是什么? 一、for循环 1、for循环语句 for语句结构 代码语言:javascript 代码运行次数:0 运行 AI代码解释 语句结构 for 变量名 in 取值列表 do 命令序列 done 代码语言:javascript 代码运行次数:0 运行 AI代码解释...
fruit=orange; and on the third and final iteration,fruit=pear. Once it has completed the loop, the script continues normal execution with the next command after thedonestatement. In this case, it ends by saying “Let’s make a salad!” to show that it has ended the loop, but not the...
Shell编程中循环命令用于特定条件下决定某些语句重复执行的控制方式,有三种常用的循环语句:for、while和until。while循环和for循环属于“当型循环”,而until属于“直到型循环”。循环控制符:break和continue控制流程转向。 参考:《Linux 与unix shell 编程指南》 ...
One can use the for loop statement even within a shell script. While the For Loop is a prime statement in many programming languages, we will focus on how to use it for the bash language. Are you ready to add yet another tool to your developer arsenal? Let’s explore deeper into the...
Shell scripting, specifically Bash scripting, is a great way to automate repetitive or tedious tasks on your systems. Why type when you can schedule and run scripts in a hands-free manner? One of the many scripting constructs is the loop. A loop is a section of code that picks up data ...
学习shell脚本 2019-12-20 17:41 − 脚本执行方式: source:用这个命令执行shell脚本的时候,不会创建新的bash(子进程),可以直接在父进程中执行,所以shell里面的变量会被改变。 sh script和./script:会创建子进程,在子进程里执行完shell后,父进程里的变量不会改变。 ... PYozo_free 0 326 shell一文入门...
Shell 流程控制 if while for if else if if 语句语法格式: ifconditionthencommand1 command2...commandNfi 写成一行(适用于终端命令提示符): if[$(ps-ef|grep-c"ssh")-gt1];thenecho"true";fi 末尾的fi就是if倒过来拼写,后面还会遇到类似的。
Adding a for loop to a Bash script Runningforloops directly on the command line is great and saves you a considerable amount of time for some tasks. In addition, you can includeforloops as part of your Bash scripts for increased power, readability, and flexibility. ...