How to add a confirmation to powershell script?

I have a script to undeploy my solution and I want to simply add a confirmation message. I found hundrets of blog entries, how to remove a confirmation via -confirm:$false parameter, but I find the opposite.

Something like this:

Write-Host "Are you shure that you want to remove the given solution (this can't be undone)?"

if (confirm() ) {
    Uninstall-SPSolution -Identity $wspIdentitySTR -confirm:$false
    .
    .
    .   
}