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Welcome back everyone. Up next, we're going to look at PowerShell script blocks.

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These are language elements that are used all the time in

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PowerShell. I know you've seen them,

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I know I've used them, but let me go through and explain in a

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little more detail about what these things are.

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A script block, by way of definition, is a collection of statements or

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expressions, and by that I mean PowerShell code, in essence,

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that can be used as a single unit.

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A script block can use parameters, and it writes to the pipeline.

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Here are some details.

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A script block, again, as I said, is a core PowerShell language element.

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It's used, for example, in things such as Where‑Object,

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ForEach‑Object, Invoke‑Command, and a lot of other Ad‑hoc

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commands that you might want to throw together.

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It's a way of defining a block of commands or a group of

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commands that you want to execute, but it allows you to do it

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from a very granular level, because you can basically save them

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all in one little script block,

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which you save to a variable, and then you just run that, so it

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saves you a lot of typing. In the documentation, you'll see these

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things referred to as scriptblocks, all one word, or script blocks, two words.

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Complex script blocks are often used in PowerShell scripting, and again,

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that's not something we're going to cover in this course, but once you

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understand what a script block looks like and how it functions, once you do get to scripting, you'll be ready to go.