Working with Functions

Abstract

The concept of a function in many programming languages, PowerShell included, has much in common with the mathematics concept of a function. A function is an operation that accepts a set of parameters and returns new values. Mathematics requires that a function depend on its parameters only; that is, it should always return the same value given the same parameters. However, shell users do not have to comply with that restriction. A function in PowerShell is just another name for a subroutine or a piece of code that can accept parameters, execute actions, and return values.