Example 4: Using C-Style Syntax #!/bin/bash # C-style for loop, which is not avaiable in /bin/sh for ((i = 1; i <= 5; i++)) do echo "Number $i" done 1. 2. 3. 4. 5. 6. 7. You can save any of these scripts to a file (e.g.,script.sh), make it executable withchmod +x script.sh, and run it with./script...
把系统升级了之后(有的时候更新系统也许也会遇到),发现使用shell,运行时会有报错:Syntax error: Bad for loop variable。仔细查看语法,并没有问题。后来才知道原因: 代码对于标准bash而言没有错,因为Ubuntu为了加快开机速度,用dash代替了传统的bash,是dash在捣鬼。 解决方法是取消dash: sudo dpkg-reconfigure dash 在...
for i in 1 2 3 4; do echo $i; done 2、测试for的自增长的循环: #!/bin/bash for ((i=1; i<=5; i++)) do echo $i; done 如果会报错,没有则跳过: Syntax error: Bad for loop variable 原因:代码对于标准bash而言没有错,因为Ubuntu为了加快开机速度,用dash代替了传统的bash,是dash在捣鬼。
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Let us look at some of the examples of using for loop in Bash now that the syntax is clear. Example 1 - for Loop to Read Input Variable Using the for loop, it is straightforward to read the predefined strings or array. Here is an example of how you can use the for loop. In the...
First, let's talk about the basic structure of aforloop, and then we'll get into some examples. The basic syntax of aforloop is: for <variable name> in <a list of items>;do <some command> $<variable name>;done; Thevariable namewill be the variable you specify in thedosection and...
PowerShell 复制 for ($i = 0 $i -lt 10 $i++){ $i } for 语句的这种替代形式适用于 PowerShell 脚本文件和 PowerShell 命令提示符。 但是,在命令提示符处输入交互式命令时,使用带分号的 for 语句语法会更容易。 for 循环比 foreach 循环更灵活,因为它允许使用模式来递增数组或集合中的值。 在下例...
PowerShell $users|ForEach-Object-Parallel{Set-ADUser$user-Department"Marketing"} 默认情况下,-Parallel 参数支持一次处理五个项。 可以使用 -ThrottleLimit 参数将其修改为更大或更小的值。 下一单元: 查看并使用 Windows PowerShell 脚本中的 If 构造 ...
ShellCheck - A shell script static analysis tool ShellCheck is a GPLv3 tool that gives warnings and suggestions for bash/sh shell scripts: The goals of ShellCheck are To point out and clarify typical beginner's syntax issues that cause a shell to give cryptic error messages. ...
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