(function($) {

  var sum = function( num1,num2 ) {

    var result = num1 + num2;

    // This works, but seems clunky - is there a better way?

    var name = sum.prototype.name;

    $(this).text( num1+' plus '+num2+' is '+result+', '+name+'.');

    return $(this);

  };

​

  var name = prompt('Please enter your name','');

​

  // Is there a better way to set this default variable?

  sum.prototype.name = name;

​

  $.fn.basicArithmetic = sum;

})(jQuery); 

// end of plugin. Example usage...

​

$('<p/>').basicArithmetic(1,5).appendTo('body');

$('<p/>').basicArithmetic(2,2).appendTo('body');

$('<p/>').basicArithmetic(25,30).appendTo('body');

$('<p/>').basicArithmetic(92.3,15.17).appendTo('body');