function getTokens(rawString) {
  // NB: `.filter(Boolean)` removes any falsy items from an array
  return rawString.toLowerCase().split(/[ ,!.";:-]+/).filter(Boolean).sort();
  //returns the raw string in all lower case so that case will not affect matching, clears punctuation, and sorts the array in alphabetical order
}

function mostFrequentWord(text) {
  var words = getTokens(text);
  //runs the getTokens function on the entered text
  var wordFrequencies = {};
  //create an empty object for wordFrequencies
  for (var i = 0; i <= words.length; i++) {
    //run the following loop as long as i is less than or equal to length of the words array
    if (words[i] in wordFrequencies) {
      wordFrequencies[words[i]]++;
    }
    else {
      wordFrequencies[words[i]]=1;
    }
    //increment the count for a particular word if found else count is just one
  }
  var currentMaxKey = Object.keys(wordFrequencies)[0];
  //set the var currentMaxKey to the keys of wordFrequencies
  var currentMaxCount = wordFrequencies[currentMaxKey];
  //sets the var currentMaxCount to the currentMaxKey of wordFrequencies
  for (var word in wordFrequencies) {
    //loop through the words in wordFrequencies
    if (wordFrequencies[word] > currentMaxCount) {
      currentMaxKey = word;
      currentMaxCount = wordFrequencies[word];
      //if the word in wordFrequencies is greater than the currentMaxCount, se currentMaxKey to equal the word and the currentMaxCount to equal the word frequencies
    }

  }
  return currentMaxKey;
  //return the results
}