Function Accumulate the Number at the End of the String

Hi there, sorry it’s been a bit quiet on the blog recently, had my head stuck in something big...

Here’s a useful PowerShell function for something I was writing. A few examples of the outputs:

ABCD   --- output ---> ABCD1

ABCD1  --- output ---> ABCD2

999    --- output ---> 1000

ABC999 --- output ---> ABC1000

The function is below (I’m sure there’s a much more elegant way of doing this):

Function AccumulateNumberAtEndOfString {

  Param([String]$InString)

      

  [Int]$Pointer             = $InString.Length -1

  [Boolean]$EndsWithNumber  = $False

  [Boolean]$Result          = $False    

      

  while (!$Result){ 

    If($InString.Substring($Pointer,1) -match "^[0-9]+$") {

      $EndsWithNumber = $True

      $Pointer--

    } else {

      $Result = $True

    }

    If ($Pointer -lt 0){$Result = $True}              

  }

      

  If ($EndsWithNumber) {  

    $InputChars  = $InString.Substring(0,$Pointer + 1)

    $InputNumber = [Int64]$InString.Substring($Pointer +1, $InString.Length - $Pointer - 1)

    $InputNumber ++

    Return ($InputChars + [String]$InputNumber)

  } else {

    Return ($InString + "1")

  }

}