JavaScript的重复机制为循环(loop) for:适合重复动作已知次数的循环。...1.初始化(initialization):初始化只在循环开始时发生 2.测试条件(test condition):测试条件检查循环是否要再继续 3.动作(action):循环里的动作就是每一轮循环实际重复执行的代码...4.更新(update):循环里的负责更新每一轮循环的循环变量。....
这种形式的循环出即for…loop结构,其一般格式如下: for(<initializer>;<exit condition>;<step action>) { <action> } 这种循环通过初始化计数器,每次循环的过程中递增或者递减该计数器,直到计数器达到退出要求。下例使用for循环重写前一节的while循环: PS C:\> for($i=0;$i -lt 3;$i++){ >> Write-...
for(<initializer>;<exit condition>;<step action>) { <action> } 初始化和步进值为可选 3. 遍历集合的循环语句 for each Loop foreach($item in $collection) { <action> } 4. 强制退出循环使用break语句;反复遍历一个集合并操作其中的大多数对象,可以使用continue语句。break所在的程序段的条件满足的情况...
通过多行Powershell变量运行For循环是一种在Powershell脚本中逐行执行多个命令或代码的方法。它可以提高脚本的可读性和维护性,同时也方便了批量操作。 优势: 简化代码:通过将多个命令或代码按行存储在变量中,可以减少脚本中的重复代码,并提高代码的可读性。 批量操作:可以一次性执行多个命令或代码,节省时间和精力。 灵...
{ sleep1;Write-Output"hello2day$_"}7: }# 8:9:$count=1010:$psName="PowerShell"11:*$winRMName="WinRM"12:$myVar=102# 13:14:for($i=0;$i-lt$count;$i++)15: {16: sleep117:Write-Output"Loop iteration is:$i"18:Write-Output"MyVar is$myVar"# 19:20: hello2day# 21:[localhost]...
For loop writing to same line in export-csv operation instead of writing new line Force connection to use SMBv1? force overwrite with copy-item? Force powershell script to continue once command freezes Force powershell.exe console to exit from a script Force PS GUI to Foreground Force Take ...
Current: one Current: two Reset Loop: 0 Current: one Current: two Reset Loop: 1 Current: one Current: two Current: three 示例5:使用 $switch 变量 $switch 变量的规则与 $foreach 变量完全相同。 以下示例演示了所有枚举器概念。 备注 请注意,NotEvaluated 事例永远不会执行,即使 break 方法之后没有...
TheBreakstatement is used to exit a looping statement such as aForeach,For,While, orDoloop. When present, theBreakstatement causes Windows PowerShell to exit the loop. TheBreakstatement can also be used in aSwitchstatement. NoteFor more information about looping in Windows PowerShell script, ...
foreach ($svr in get-content "C:\Users\myUser\PS\serverINstances.txt"){ $svr $dt = new-object "System.Data.DataTable" $cn = new-object System.Data.SqlClient.SqlConnection "server=$svr;database=msdb;Integrated Security=sspi" $cn.Open() $sql = $cn.CreateCommand() $sql.CommandText =...
Additionally, instead of using an explicit $loaded variable, I could have used the Windows PowerShell break statement to exit the delay loop. Windows PowerShell has a rich set of control structures that allow you to program in many different styles, including whatever programming style you are ...