JavaScript (function ($) {...}) What does (jQuery) mean?

in JavaScript (function ($) {...}) What does (jQuery) mean.

======================================================================//This is a split line.
function First (ARG) {

//....
}
This form is called an anonymous function in JavaScript. Arg is an argument to an anonymous function.


instead (function ($) {

(jquery); This is the form of executing anonymous functions and passing parameter jQuery.

=========================================================================//This is a split line.
is actually equivalent to
var func = funtion ($) {
//.....
};

func (jQuery);

============================================================================//This is a split line.
In fact, these two ways of writing is a meaning. It's just written directly in the form above.

(function ($) {...}) (jQuery)