RosettaCodeData/Task/Sum-digits-of-an-integer/PowerShell/sum-digits-of-an-integer-2.psh

function Get-DigitalSum ([string] $number, $base = 10)
{
    Invoke-Expression (($number.ToCharArray() | ForEach-Object {[string][convert]::ToInt16($_, $base)}) -join "+")
}