How can I make var a = add(2)(3); //5 work?

Question

I want to make this syntax possible:

var a = add(2)(3); //5

based on what I read at http://dmitry.baranovskiy.com/post/31797647

I\

Answer 1

function A(a){
  return function B(b){
      return a+b;
  }
}

I found a nice explanation for this type of method. It is known as Syntax of Closures

please refer this link Syntax of Closures