#REQUIRES statements

It's no secret that some code has prerequisites that need to be met in order for it to work. In PowerShell, certain types of requirements can be specified in scripts using a #REQUIRES statement. Although the #REQUIRES statement looks like a comment (that is, it starts with #), it is a statement to the engine that tells PowerShell not to run the script unless the requirements are met. As of PowerShell Version 4.0, the following options are available in a #REQUIRES statement:

Option	Parameters	Notes
–Version	N[.N] (for example, 4.0)	Required version of PowerShell engine
–PSSnapIn	PSSnapinName [–Version N[.N]]	Required Snapin (with optional minimum version #)
–Modules	ModuleName[,ModuleName] or Hashtable	Required modules to be loaded
–ShellID	ShellID	Required PowerShell Host (for example, Microsoft.PowerShellISE)
–RunAsAdministrator	none	Required session privileges

When the conditions of the #REQUIRES statement are not met, or cannot be met, the...