Set-PSDebug

Turns script debugging features on and off.

Syntax
      Set-PSDebug [-trace int] [-step] [-strict] [CommonParameters]

      Set-PSDebug [-off] [CommonParameters]

Key
   -trace int
       Set the trace level:
          0 - Off
          1 - trace script lines as they are executed
          2 - trace script lines, variable assignments, function calls and scripts.

   -step 
       Turn on script stepping. Before each line is run, PowerShell will prompt
       to stop, continue or enter a new interpreter level to inspect the state
       of the script. (Step automatically sets Trace =1)

   -strict 
       Throw an exception if a variable is referenced before being assigned a value.

   -off 
       Turn off all debugging features.

   CommonParameters:
       -Verbose, -Debug, -ErrorAction, -ErrorVariable, -WarningAction, -WarningVariable,
       -OutBuffer -OutVariable.

Examples

Set the trace level to 2:

PS C:\> set-psdebug -trace 2;

Turns stepping on:

PS C:\> set-psdebug -step

Turn off all debugging features:

PS C:\> set-psdebug -off

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it" ~ Brian W. Kernighan

Related:

Write-Debug - Write a debug message to the host display
Set-StrictMode - Enforce coding rules in expressions & scripts
Equivalent bash command: set -x / +x - turn debug on/off, or bash -x myscript.sh


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