2016 Update

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

@@ -1,7 +1,14 @@
-function Get-DigitalSum ($n)
+function Get-DigitalSum ([string] $number, $base = 10)
 {
-    if ($n -lt 10) {$n}
-    else {
-        ($n % 10) + (Get-DigitalSum ([math]::Floor($n / 10)))
+    if ($number.ToCharArray().Length -le 1) { [Convert]::ToInt32($number, $base) }
+    else
+    {
+        $result = 0
+        foreach ($character in $number.ToCharArray())
+        {
+            $digit = [Convert]::ToInt32(([string]$character), $base)
+            $result += $digit
+        }
+        return $result
     }
 }