how do i know if i have powershell installed code example

Example: powershell check if software is installed

$software = "Microsoft .NET Core Runtime - 3.1.0 (x64)";
$installed = (Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* | Where { $_.DisplayName -eq $software }) -ne $null

If(-Not $installed) {
	Write-Host "'$software' is NOT installed.";
} else {
	Write-Host "'$software' is installed."
}

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