I could not find info on this on the web and thus did some trial and error and am posting here for others. If I am in error somehow, please post a correction comment. Looks like it is the same as in Java:

/*Comments*/
//Comment

Interestingly, eclipse color formatting in its editor appears to only recognize them as comments (displayed as all blue) if there is a space immediately before the start of the comment. For example:

/* Comments*/
// Comment

Regards,

Jeff