ps1 script to check if an app installed

param(
[string]$AppToCheckIfInstalled
)

if ($AppToCheckIfInstalled) {

	Write-Host Checking if the application $AppToCheckIfInstalled has already been installed...

	# $cmdOutput = $AppToCheckIfInstalled 2>&1
	$rawOutput = (cmd /c $AppToCheckIfInstalled 2`>`&1)

	if ($rawOutput -like "*'$AppToCheckIfInstalled' is not recognized*") {
	    Write-Host "$AppToCheckIfInstalled not installed yet"
	}
	else {
	    Write-Host "$AppToCheckIfInstalled already installed"
	}
}
else {
	Write-Host "Missing application name, exiting..."
}