<Packagename> already installed.
Use --force to reinstall, specify a version to install, or try upgrade.

<Packagename> already installed.
Use -force to reinstall, specify a version to install, or try upgrade.

Install-App <Packagename + parameters>

function Install-App
{
    //..code ommited..
    $chocoCommand = "choco install <Packagename + parameters>"
    iex $chocoCommand
}