$PSItem was added to PowerShell in an attempt to provide a clearer meaning to the variable name. However, in practice, the dollar sign underscore form $_ is most commonly used.

When you use a variable in a template that isn't marked as available in templates, the variable doesn't render. The variable doesn't render because its value isn't accessible within the template's scope.

Sep 6, 2023 · If you specify values for <variable> and <string>, the specified <variable> value is added to the environment and <string> is associated with that variable. If the variable already exists in the …

The New-Variable cmdlet creates a new variable in PowerShell. You can assign a value to the variable while creating it or assign or change the value after it is created.

Jan 14, 2026 · The recommended ways to set secret variables are in the UI, in a variable group, and in a variable group from Azure Key Vault. You can also set secret variables in a script with a logging …

Jan 9, 2026 · Variables that are defined as expressions shouldn't depend on another variable with expression in value since it isn't guaranteed that both expressions will be evaluated properly. For …

Working with variables To create a new variable, use an assignment statement to assign a value to the variable. You don't have to declare the variable before using it. The default value of all variables is …

Jul 15, 2025 · To reference a variable in a variable group, you can use macro syntax or a runtime expression. In the following examples, the group my-variable-group has a variable named myhello.

Oct 20, 2023 · By using a variable, you can get the same outcome, but in a more readable way. And because the result of the expression is stored in the variable, the measure's performance can be …

Oct 27, 2025 · User-defined variables can be set as read-only. There are naming restrictions for variables (example: you can't use secret at the start of a variable name). You can use a variable …