Again, another simple question but this one is regarding the example in the book as follows:
function someEventHandler(e) {
// use e.
}
The text says "Often the argument is abbreviated as just e or evt, short for event." Are "e" and "evt" reserved keywords? Or is the text just saying that "e" and "evt" are used commonly as the argument? Any argument could have been used such as "x" and "y", correct?