[removed]What is meaning of sum(2)(3) //returns 5;

Question

Here is code blow to return it\'s value.

function sum(a){
  return function(b){
    return a+b;
  }
}
sum(2)(3);

It returns 5 but

Answer 1

Your 'sum' function returns another function which returns a+b (2 parameters). Both functions together require two parameters: (a) and (b)
The inner most return, returns a+b. Plugging in your parameters, we get the equation: 2+3.
Which gives you 5.

Please let me know if you have any questions or concerns.