Random number guessing game - refactor

randNum_v2.js

"use strict";

var upper = 10000,
    numToGuess = getRandomNumber(upper),
    compGuess,
    numOfGuesses = 0;

function getRandomNumber(upper) {
  return Math.floor( Math.random() * upper ) + 1;
}

while ( compGuess !== numToGuess ) {  
    compGuess = getRandomNumber(upper);
    numOfGuesses++;
}
console.log('Hooray! The number was: ' + numToGuess + '. And the computer guessed: ' + compGuess);
console.log('It took ' + numOfGuesses + ' to get it right.');