dice-roller.js

function rollDice (rolls) {
  var result = "Rolled " + rolls + " dice: "
  for (var i = 0; i < rolls; i++) {
      var rollNum = Math.floor((Math.random(rolls)*6)+1);
      if (i < rolls - 1) {
        result += (rollNum + ", ");
      } else {
        result += rollNum;
      }
  }
  return result;
};

console.log(rollDice(process.argv[2]));

broke the single responsibility principle...sorry ¯_(ツ)_/¯