--This is a single line comment
Explanation: Comments are used to explain something in the script or give information about the script. Comments are ignored by AppleScript during execution. Using -- we can have single line comments.
#This is another single line comment
Explanation: Using # we can write single line comments
(* this is a multi line comment *)
Explanation: Multi line comments begin with ( and end with ). It can contain multiple lines of explanation. Usually used to specify author and copyright status.