Besides explicitly importing modules into a script, you can annotate the script with a special comment that tells the PowerShell engine that certain modules are required for the script to run. This is done using the #Requires statement. As #Requires starts with a number sign, it is a comment. However, this special comment has arguments like a cmdlet has. To indicate that a list of modules are required, simply list the module names, as shown in the following screenshot:

There are several other useful options possible with the #Requires statement. To see them, see the about_Requires help topic.