> >> Define function add such that>
> >>      add(3)(4)
> >> returns 7.

> > javascript:alert((function add (p) { var a=p; return function (p)
> > { return a+p } })(3)(4))

> You don't need to create an extra variable.

> function add (first) {
>     return function (second) {
>         return first + second;
>     }

> }