Really need you help with this challenge: "The Student Record Search Challenge Solution"

/*
Goal objectives correspond to the script number references.

The goal is to create a program that: 

  1)  contains a print function that will write to the innerHTML of a div element.
  2)  contains a print student report function that returns the value of a student's data.
  3)  contains an array of objects; these objects will hold the student's data.
  4)  contains a variable to hold the value of a message, so that I can build a
         message and send the complete message to the print function.
  5)  contains a search variable, via the user prompt dialogue.  It sets the
         user response equal to the search variable.
  6)  contains an empty array variable, from which we will add the student id's;
         later we will compare the search-for id with the built-up id array.
  7)  contains a student variable to pass to the student report function.
  8)  contains a while loop so that the program can search multiple student's
         data, until the user types quit, or the null
         is invoked via the cancel button on the prompt dialogue box.
  9)  contains a for loop that creates a new array of id values to compare
         against user response via prompt.
  10)  contains an indexOf method in case what the user entered was not in the
         array of student ID's.
  11)  contains a for loop to cycle through all of the users ID's and prints out
         those records that have matching user ID's.
*/


// 1)
function print(message) {
  var outputDiv = document.getElementById('div');
  outputDiv.innerHTML = message;
}

// 2)
function getStudentReport(student) {
  var report = 'ID: ' + student.id + '<br>';
  report += 'Name: ' + student.name + '<br>';
  report += 'Track: ' + student.track + '<br>';
  report += 'Achievements: ' + student.achievements + '<br>';
  report += 'Points: ' + student.points + '<br><br><br>';
  return report;
}

// 3)
var students = [
  {
    id: 1,
    name: 'matt',
    track: 'Front-End Design',
    achievements: 30,
    points: 2456
  },
  {
    id: 2,
    name: 'matthew',
    track: 'IOS Design',
    achievements: 32,
    points: 3400
  },
  {
    id: 3,
    name: 'matty',
    track: 'Back-End Design',
    achievements: 33,
    points: 3450
  }
];

// 4)
var message = '';

// 5)
var search;

// 6)
var studentId = [];

// 7)
var student;

// 8)
while (true) {
    // gathering the student response in the form of the prompt method.
    search = prompt("Enter student Id. Type 'quit' to exit.");
    // outlining the text and or methods to end the program.
    if (search.toLowerCase() === 'quit' || search === null) {
      break;
    }
    // converting the string response for prompt to an integer, as the id
    // is an integer data value.
    else {
      search = parseInt(search);
    }
    // building an array, of which we will compare user response via
    // the search variable we gathered using the prompt method.

// 9)
    for (i = 0; i < students.length; i += 1) {
      studentId.push(students[i].id);
    }

/* 10)
        comparing the index value of the prompt response (search) against the
        array position of the studentId array.  If the search index is not in
        the array, then the script outputs the message.
*/

      if(studentId.indexOf(search) === -1) {
        message += "ID " + search + "  is not an ID in our database. Please ";
        message += "enter a valid ID, or type 'quit' to exit.<br><br><br>";
        print(message);
      }
      else {
/* 11)   
      else, the script looks for the search value in the array index and
      outputs the array record for the searched for student.
*/
        for (i = 0; i < students.length; i += 1) {
          student = students[i];
          if (student.id === search) {
            message += getStudentReport(student);
            print(message);
          }
        }
      }
}