gistfile1.ps1

$filepath = Read-Host "Please enter absolute path to file."
$filetest = Test-Path $filepath

if ("$filetest" -eq "True") {
    Write-Host $filepath "present."
} else {
    Write-Host $filepath "does not exist."
    $Wish = Read-Host "Would you like to create this file - yes or no?"
    if  ("$Wish" -eq "yes") {
        New-Item -ItemType file -Path $filepath -Force
    }
}