Using the IF statement

Occasionally, you'll want to check for a specific condition and, if the condition is met, execute some code. You can use the IF statement. The basic syntax of the IF statement is

If (condition 1)
  { execute code }
Elseif (condition 2)
  { execute code }
Else
  { execute code }

The Where-Object fi lter could be rewritten using a ForEach loop with an IF clause, like this:

$colLog = get-EventLog -list
ForEach ($Item in $ColLog) {
If ($Item.MaximumKilobytes -gt 15168) {
"{0,-30} {1,15}" -f $Item.Log, $Item.MaximumKilobytes }
}

The collection of logs is stored in the $colLog variable. The ForEach loop loops through each log in the collection and includes an IF statement. Notice that the IF statement has a condition (enclosed in parentheses), and the statement (or statements) to execute when the condition is true is enclosed in a set of curly braces ({ }).

When using the IF statement, you can include as many statements as desired within the curly braces. When the condition is met, all the statements in the curly braces will be executed.

The following code checks to see the status of the eventlog service and includes the Elseif and Else clauses. If the service is running, it outputs "Running". If the service is not running, it checks to see if it is stopped and, if so, outputs "Stopped". If it's not running or stopped, it'll output a line indicating the service is not running or stopped (indicating it is paused).

$service = Get-Service |
 Select name, service, status | where {$_.name -like "eventlog"}
If ($service.status = "Running")
{Write-Host "Running"}
Elseif ($service.status = "Stopped" )
{Write-Host "Stopped"}
Else
{Write-Host "Service not stopped or running"}