Get Last Digit of String

function Get-StringLastDigit
{
    <#
    .SYNOPSIS
        Get the last digit of a string.

    .DESCRIPTION
        Get the last digit of a string using regular expression.

    .PARAMETER String
        Specifies the String to check

    .EXAMPLE
        PS C:\> Get-StringLastDigit -String "Francois-Xavier.cat5"
        5

    .EXAMPLE
        PS C:\> Get-StringLastDigit -String "Francois-Xavier.cat"
        <no output>

    .EXAMPLE
        PS C:\> Get-StringLastDigit -String "Francois-Xavier.cat" -Verbose
        <no output>
        VERBOSE: The following string does not finish by a digit: Francois-Xavier.cat

    .NOTES
        Francois-Xavier Cat
        @lazywinadmin
        lazywinadmin.com

    .LINK
        https://github.com/lazywinadmin/PowerShell
#>
    [CmdletBinding()]
    param($String)

    try
    {
        # Check if finish by Digit
        if ($String -match '^.*\d$')
        {
            # Output the last digit
            $String.Substring(($String.ToCharArray().count) - 1)
        }
        else
        {
            Write-Verbose -Message "The following string does not finish by a digit: $String"
        }
    }
    catch
    {
        $PSCmdlet.ThrowTerminatingError($_)
    }
}