Measure objects in the pipeline
The Measure-Object command can accept any kind of object in a collection. By default, the command counts the number of objects in the collection and produces a measurement object that includes the count.
Note
The Measure-Object command has the alias Measure.
The -Property parameter of Measure-Object allows you to specify a single property, which must contain numeric values. You can then include the -Sum, -Average, -Minimum, and -Maximum parameters to calculate those aggregate values for the specified property.
Note
PowerShell allows you to truncate a parameter name, or use only a portion of the parameter name, if the truncated name clearly identifies the parameter. You'll frequently notice the –Sum, -Minimum, and –Maximum parameters truncated to -Sum, -Min, and -Max, corresponding to the common English abbreviations for those words. However, you can't shorten ‑Average to -Avg, although beginners frequently try to. You can shorten the ‑Average parameter to -Ave, which is a valid truncation of the name.
The following command counts the number of files in a folder and displays the smallest, largest, and average file sizes:
Get-ChildItem -File | Measure -Property Length -Sum -Average -Minimum -Max