// -- starts a comment
// This is a comment!
The double-slash ('//') is (besides REM and '#') the third way to start a comment. '//' is the latest and greatest in the field of commenting and allows yab to catch up with such cool languages like C++ and Java.
// Another comment.
print "Hello world!" // Another comment
Unlike the example given for '#' this example is syntactically correct and will not produce an error.