Number guessing game

numberGuessingGame.js

// Write a function that is a number guessing game. It should determine a random number from 1-100, and let the user guess the number. 
// It should report back whether their guess is correct, too high, or too low. Important: if the user guesses a number they've already 
// guessed, it should tell them they have previously guessed this number. Until they guess the correct number, it should continue to prompt 
// them. Once they've guessed the correct number, it should congratulate them and tell them how many guesses they took to solve the problem 
// (minus any duplicate guesses).

function game() {
  var guess = [] // store user's guesses
  var randNum = Math.floor(Math.random() * (100)) + 1
  function numberGuesser(num) {
    if (guess.indexOf(num) !== -1) { // if current guess is found in our storage of guesses
      return 'You already guessed this number'
    }
    if (typeof num !== "number") { // if argument isn't a number
      return 'Argument must be a number!'
    }
    guess.push(num)
    if (num < randNum) { // if guess is lower
      return 'Your guess is too low'
    }
    if (num > randNum) { // if guess is higher
      return 'Your guess is too high'
    }
    else {
      return 'Congrats! You got it!! IT ONLY TOOK YOU ' + guess.length + ' TRIES'
    }
  }
  return check // return a function to be called later
}

var check = game() // invoke 'game', which returns a function. Give it a name, 'check'
check(44) // invoke 'check' with a number guess
check(44) // invoke again with the same number, get a message: 'You already guessed this number'