Anything in PowerShell is an object. You can use GetType() to get the object type:
'Hallo'.GetType().FullName
(4).GetType().FullName
(2.6).GetType().FullName
(Get-Date).GetType().FullName
(4).GetType().FullName
(2.6).GetType().FullName
(Get-Date).GetType().FullName
