How Jquery knows that "intIndex" is the loop iteration index?

[gintare]

How Jquery knows that "intIndex" is the loop iteration index?

The example, which i do not understand is from: http://www.bennadel.com/blog/534-the-beauty-of-the-jquery-each-method.htm

// Loop over each hottie.
$( "#girls a.hottie" ).each(
 
    // For each hottie, run this code. The "indIndex" is the
    // loop iteration index on the current element.
    function( intIndex ){
 
        // Bind the onclick event to simply alert the
        // iteration index value.
        $( this ).bind (
            "click",
            function(){
                alert( "Hottie index: " + intIndex );
            }
            );
 
    }
 
    );
 

[Dormilich]

How Jquery knows that "intIndex" is the loop iteration index?

because it puts the index there.

// e.g. jQuery 1.11.1 line #383
value = callback.call( obj[ i ], i, obj[ i ] );

[gintare]

THE ANSWER IS IN OFFICIAL DOCUMENTATION:
https://api.jquery.com/index/

The variable in index(variable) function refers to the index of current element.

[gintare]

Thank you Dormilich.