original_query: What is the purpose of the Get-Accumulator function in PowerShell?
query: What is the purpose of the Get-Accumulator function in PowerShell?
answer: The Get-Accumulator function in PowerShell creates and returns a closure (a script block) that acts as an accumulator.  Each time the returned closure is called with a value, that value is added to an internal counter, and the updated counter value is returned.