Var finns powershell
Nu finns möjlighet att skicka ut powershell script med Intune. Variables in PowerShell are used to store values, data, or other information you need later in your script. They can also used to capture the results of a cmdlet. But how do you create variables, and use them outside a function for example? In PowerShell, we have different scopes where variables can belong.
Scopes protect the variables from being changed, but they can also prevent you from accessing a variable that you have created in a function. In this article, we are going to look at how to assign and use variables and use them in different scopes. The variable names can include spaces and special characters, but you really should avoid that. Spaces and special characters will make the code harder to read and will cause a lot of mistyping in your script.
PowerShell variables are loosely typed, which means that a string variable can change into an integer, array, or hashtable for example. What you also need to know is that there are three types of variables in PowerShell. We are not talking here about whether a variable is a string or an integer, but where the variable originates from. As already briefly covered in the beginning, creating a variable is pretty straightforward.
For a simple, loose typed, variable, you only need to specify the variable name. The set-variable cmdlet has some advantages when creating a variable, you could for example give a description to your variable or make it read online. To specify the type when creating a variable, you will need to use the cast notation. You do this by placing the type name in brackets before the variable:.
PowerShell will accept the value, as long as it can convert it to the correct type. If you want to know what the type of a variable is in PowerShell, then you will need to use the GetType method. This will return the base type, type name, and a lot of other information about the variable.
How to use PowerShell Variables
To only view the type name, select the name property:. Another option is to remove variables in PowerShell. This will remove the variable and its value completely from your PowerShell session. To do this, you will need to use the Remove-Variable cmdlet. When you want to remove or clear a variable in PowerShell for security reasons, then there is something to keep in mind. PowerShell is built on.
Net, and. Net uses a garbage collector to clear up memory items that are no longer needed. The Clear-Variable cmdlet actually makes a copy of the variable and marks the old one for collection. Whereas the Remove-Variable cmdlet marks the original one for collection.
about_Automatic_Variables
In a script, you would commonly use the Write-Host cmdlet to output the value of a variable. When you want to include the variable inside a string, you will need to make sure that you are using double quotes " ". Only then will the value of the variable be used. If you use a single quote, then the variable name is used as an expression. If the variable contains an object, then you can output the different properties by using the.
You specify the variable name followed by a dot and the property name.
Take the following hashtable :. But when you want to use the same property inside a string, then you will need to wrap this inside parentheses, like so:. Variables are only visible and accessible in their current scope and their child scopes. Variables inside the global scope are always accessible inside the script or local scope. To access or update variables inside another scope, you will need to use the scope modifier to access it.
Another common situation is where you need to access a variable outside a ForEach-Object loop or outside an Invoke-Command script block. Try to minimize the use of the global scope as much as possible, because it will make your code harder to read and it can be accessed from anywhere in the script. If you are using global variables in PowerShell, then declare them at the beginning of the script.
Have you forgotten a variable name?