When researching a command to discover if it is Cmdlet, Function, Alias, etc.; it helps to get as much information as possible. To do this combine the powers of help and the command cmdlets.
Here we lookup mkdir with Get-Help and it pulls the help file for New-Item. We might assume that it is an alias, but lets use Get-Command to get the full story.
Now with this added information, we see that it is indeed a function that uses New-Item. Using Get-Help and Get-Command together can help us learn and better understand what we have to work with and how exactly it is working.
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