text: function Sum (a, b) {
    let result = undefined
    if(typeof a == "number" && typeof b == "number") {
      result = a + b
    }
    return result
  }
  
  function AddList(arr) {
    let reslt = undefined;
    if(arr.length > 0) {
      for(var i = 0; i < arr.length; i++){
        result = result + arr[i];
      }
  
    }
    return result;
  }
  //console.log(Sum(2,3)==5);
  //console.log(Sum(-10,-20)==-30);
  
  
  
  export { Sum };