Windows Server 2012 Automation with PowerShell Cookbook

Dealing with errors in PowerShell

When creating a script in any language, error handling is needed to ensure proper operations. Error handling is useful when debugging scripts and ensuring scripts work properly, but they can also present alternative methods of accomplishing tasks.

How to do it...

Carry out the following steps:

1. Create a simple function that uses no error handling

   Function Multiply-Numbers
   {
       Param($FirstNum, $SecNum)
       
       Write-Host ($FirstNum * $SecNum)
   }

2. Test the function using various arguments:
   
3. Update the function using a Try/Catch block:

   Function Multiply-Numbers { Param($FirstNum, $SecNum) Try { Write-Host ($FirstNum * $SecNum) } Catch ...