LastExitCode.md

Last exit code

Last exit code represents the exit code of last command.

ping bing.com
$LastExitCode

And you will see:

0

Which means the last command gcm help finished successfully.

If you ping something that does not exist, you will see:

ping aaaaaa
$LastExitCode

And you will see:

1

Emmm. Good. Exit code 0 means success and exit code 1 means failure.

Now you learned that, let's try this:

gcm help

And you will see:

$LastExitCode
0

But if you try:

gcm xxxxxxxxxxx
gcm : The term 'xxxxxxxxxxxxx' is not recognized as the name of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ gcm xxxxxxxxxxxxx
+ ~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (xxxxxxxxxxxxx:String) [Get-Command], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException,Microsoft.PowerShell.Commands.GetCommandCommand

However, now the $LastExitCode is still 0!

$LastExitCode
0

What a strange behavior of PowerShell! 😲