Create Directory if not exist

[TheVig]

Can't seem to get this to work right.
Function Create_Directory

Code:

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if(!dir("$desktop$\Test_Folder"))
,out "not there"
,mkdir ("$desktop$\Test_Folder")
else
,out "it is there"

It creates the directory if non existent....but also creates again if it does exist...what do I have wrong?