function getTokens(rawString) {
  // NB: `.filter(Boolean)` removes any falsy items from an array
  // .lowercase changes all words in the array to lowercase and .split removes and of the  characterd in the braces
  return rawString.toLowerCase().split(/[ ,!.";:-]+/).filter(Boolean).sort();
}

//this line is declaring the function and using (text) as the argument.
function mostFrequentWord(text) {
  // the variable words has been declared as the getTokens Function from above and text is the argument.
  //getTokens puts all of the words in the string into an array
  var words = getTokens(text);
  // the variable wordFrequencies is being declared as an object that has not been defined yet that the words from
  //the array will be put into
  var wordFrequencies = {};
  //this is a for loop that has been created to go through the words array that is in the getTokens function and
  //going to go through the full length of the array
  for (var i = 0; i <= words.length; i++) {
    // this is if statement will be run through each loop. If anything in words index is in wordFrequencies the
    //statement below it will be run and keep adding 1 more to it
    if (words[i] in wordFrequencies) {
      wordFrequencies[words[i]]++;
    }
    //if the if statement above does not eqaul to true then this else statement will run. If there is no more then 1 of the
    // specific word it will just = 1
    else {
      wordFrequencies[words[i]]=1;
    }
  }

  // the currentMaxKey is the list of keys with an object
  var currentMaxKey = Object.keys(wordFrequencies)[0];

  //the variable currentMaxCount is being declared as the currentMaxKey that is declared above from the
  //wordFrequencies array
  var currentMaxCount = wordFrequencies[currentMaxKey];

  //this is a for loop that will be run through the properties word in the wordFrequencies object
  for (var word in wordFrequencies) {

    // this is an if statement that will execute if wordFrequencies[word] is greater then currentMaxCount. The word with the current
    // max count will be the one that takes p
    if (wordFrequencies[word] > currentMaxCount) {

      // the var currentMaxKey should be declared as word - the workd is the value of the highest count
      //and the var currentMaxCount will be declared as wordFrequencies[word];
      currentMaxKey = word;
      currentMaxCount = wordFrequencies[word];
    }
  }
  //Returns the key value of the most used word
  return currentMaxKey;
}