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PowerShell Variables is a free tutorial by Paul Hill from PowerShell course
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Course summary:
Understand the Powershell command line
How to write Powershell scripts to automate redundant tasks
Install and Update Windows PowerShell
Learn the Basics of Windows PowerShell 5.1
Introduction to the Text Based Console and Intelligent Scripting Environment (ISE)
Utilize the PowerShell Help System
Finally Understand PowerShell Syntax
Understand Objects, Properties and Methods
Understand the PowerShell Pipeline
Create and Manage Active Directory Users with PowerShell
Create and Delete Organizational Units with PowerShell
English [Auto]
Ello there this is instr. part in this lecture. We're going to learn about power shell variables. So we're going to do most of our work today in the power show. Although you can use either one or the one. So what I'm going to do is to open the IAC. And one thing to keep in mind is I'm running this as an administrator and this is important because some of you might have power show execution policies that may block you know you running scripts. So one way to get around that is to run the show as an administrator and you can change the execution policy. I'm not going to get into that in this lecture but just so you understand how my environment is set up I wanted to make sure I made that clear. So first let's talk about what is actually a variable while it's something that's not fixed or it doesn't have a fixed pattern it's liable to change right. So in our old math classes we learned you know X equals 1 and if we do X plus X would equal 2 and x times x is equal to 1 because we're essentially doing you know one times one is equal to one one plus one is equal to 1 divided by 1. So X divided by X would be equal to 1 because if you divide you know basic math we all understand what this basically means on power shall we can also use variables and we won't only be using it to store you know basic math or basic integer numbers we can also store strings in different things like that and it's extremely useful. So let's just jump right and get started. So how do you actually declare a variable on power show. It's as simple as using the dollar sign or shift for. And then we just declare the variable name so we can call it my variable and if I run this I can it play. And we have just declared a variable. Now if we go out this this variable say my variable and we can either do this up here in the IAC or we can do down here in the command prompt doesn't matter. We press Enter we're going to get a blank output because we haven't assigned any type of value to my variable. We could say I'm just going to use this command line down here and we could say my variable equal to test and press enter. And now if we type in echo my variable is tab for auto completion. We now get test. Now another way we can output this data is simply by just typing in the name of the variable. So my variable of press tab enter notice I'm not typing in the word EQ or anything like that I just press enter. It will output the contents of this variable. Or whatever the value that is assigned to is variable. So let's just say make a new variable we'll call it processes and this process is going to be equal to get Dasch process and I'll press tab to complete that. And if we run this again we're not going to get any result but now if we Ecko processes we're going to get the output of the command get process which was stored in the variable processes. So if I scroll up here we can see the output of this variable. Now if I was just run get Dasch processes at the same time press Enter will do the exact same output. The reason why it's useful to store information in variables. It can capture a specific state of our computer at a specific point in time. You know we can manipulate these variables later on in that kind of thing so if we wanted to manipulate the data that was stored in processes we can just type in that variable name it tab and we can pipe that to a select object command. And as you know select hash object will allow us choose for example the ID and the process name. We can do that by just saying ID in process name press enter and now we are just outputting this to information. So these two columns rather. So you're able to manipulate this information just like just running the Get process command. So we run Get process that through. We get the exact same output. One of the most useful things when you're doing processing variables you know a lot of times you want to get the user input. So if we create a variable we'll call this user input and we are going to say is equal to read Dasch host