In PowerShell, you can make a variable a range by using the range operator. You can specify a range of values by separating the starting and ending values with two periods (..). For example, if you want to create a variable that contains a range of numbers from 1 to 10, you can do so by assigning the range to a variable like this: $numbers = 1..10. This will create an array or list of numbers from 1 to 10, which you can then use in your scripts or commands.