Powershell: QuickCMD: Get the length of a number

 First convert the number to a string, and then get the length of the string:

(12345).tostring().length

 

http://blogs.technet.com/b/heyscriptingguy/archive/2014/02/08/powertip-use-powershell-to-get-length-of-a-number.aspx

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