const sumAll = function(x, y) {
    let theSum;
    for (let i = x+1; i <=y; i++) {
    theSum = x += i 
    }
  
  return theSum

  if (x | y <0 ) {return('ERROR')}

  
};


// Need to add conditions for ERROR-message


// Do not edit below this line
module.exports = sumAll;