function add() {//1
if (arguments.length === 2 && typeof(arguments[0] + arguments[1]) == 'number')
{return arguments[0] + arguments[1];}
else if(arguments.length === 1 && typeof arguments[0] === 'number' ) {//2
var oneNumber = arguments[0];
{ return function(n){//4
if(typeof n !== 'number') {return 'undefined';}//4-
else {return oneNumber + n;}};
}//3-
}//2-
else {return 'undefined'}
}
add("http://bit.ly/IqT6zt");
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You can use [html][/html], [css][/css], [php][/php] and more to embed the code. Urls are automatically hyperlinked. Line breaks and paragraphs are automatically generated.