Output is correct when using console.log(), even in browser... What did I do wrong?

[rafaelteboekhorst]

Tell us what’s happening:
Output is correct when using console.log(), even in browser… What did I do wrong?
Probably I did not understand the question correctly right?

  **Your code so far**

function addTogether() {
  let argument1 = arguments[0];
  let argument2 = arguments[1];

  if (typeof argument1 === 'string' || typeof argument2 === 'string'){
      return undefined;
  }
  else if(Array.isArray(argument1) || Array.isArray(argument2)){
      return undefined;
  }

  if (argument2 === undefined){
      const sum1 = function sum1(b) {
          console.log(argument1 + b);
      }
      return sum1;
  }
  else {
      const sum2 = argument1 + argument2;
      console.log(sum2);
      return sum2;
  }
 
}
addTogether(5)(7);

  **Your browser information:**

User Agent is: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:99.0) Gecko/20100101 Firefox/99.0

Challenge: Arguments Optional

Link to the challenge:

freeCodeCamp.org

[JeremyLT]

@rafaelteboekhorst

  if (typeof argument1 === 'string' || typeof argument2 === 'string'){
      return undefined;
  }
  else if(Array.isArray(argument1) || Array.isArray(argument2)){
      return undefined;
  }

This isn’t the same as checking if the arguments are not numbers. You’re coding to the tests instead of the requirements.

@rafaelteboekhorst

console.log(argument1 + b);

Oops. This isn’t the same as returning