Statement(s) to be executed if expression is not true fi如果 expression 返回 true,那么 then 后边的语句将会被执行;否则,执行 else 后边的语句。 3) if ... elif ... fi 语句 if ... elif ... fi 语句可以对多个条件进行判断,语法为: Shell case esac语句 case ... esac 与其他语言中的 switc...
shell script 学习笔记---if,for,while,case语句 1、if内的判断条件为逻辑运算: 2、if内的判断条件为目录是否存在,文件是否存在,下图先检验目录/home/monster是否存在,然后再检测/home/monster中的file.txt文件是否存在,这里需要注意的是在进行文件目录是否存在一类的判断时,只能使用"[]"括号。“()”括号一般仅用...
\Program Files" case 8 'Opens the Favorites folder oshell.Shell_Open "C:\WINDOWS\Favorites" case 9 'Displays the Taskbar Properties dialog box oshell.Shell_TrayProperties end select end function --> </SCRIPT> </HEAD> <BODY> <H1>Start...</H1> <INPUT type="button" value="Edit Taskbar...
In this example, the script first checks if ‘a’ is greater than ‘b’. If it’s not, it moves on to the ‘elif’ statement to check if ‘a’ is greater than ‘c’. If neither condition is met, it executes the ‘else’ statement, which in this case, prints ‘a is not greate...
if[expression]thenStatement(s)to be executedifexpression istruefi 注意:expression 和方括号([ ])之间必须有空格,否则会有语法错误。 if…else也可以写成一行,以命令的方式来运行,像这样: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 iftest $[2*3]-eq $[1+5];then echo'The two numbers are...
script-block-expression: { new-lines~opt~ script-block new-lines~opt~ } script-block: param-block~opt~ statement-terminators~opt~ script-block-body~opt~ script-block-body: named-block-list statement-list 描述:§8.10.9中介绍了 参数块。 named-block-list 在§8.10.7 中介绍。脚本...
In the Korn shell, both commands produce the same result. However, because the second is not a valid command in the Bourne shell, setting and exporting environment variables in one statement may cause an error atlogin and, more important, not achieve the desired result of setting the MANPATH...
Compare two mailbox users directly in compare-object scriptblock compare two strings in if-then-else statement Compare two text files in Powershell and if a name is found in both files output content from file 2 to a 3rd text file Compare-Object : Cannot bind argument to parameter 'Referenc...
This little script can easily create the Snap-In assembly. The first thing that I need to do is create an alias for the C# compiler, once that is established I find the location of the System.Management.Automation.dll and compile the assembly:...
Adding thecleanblock is a breaking change. Becausecleanis parsed as a keyword, it prevents users from directly calling a command namedcleanas the first statement in a script block. However, it's not likely to be a problem. The command can still be invoked using the call operator (& clean...