How does this code work?

var message = '';
var student;
var search;

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

function printStudentData(student) {
  var data =  '<h2>Student: ' + student.name + '</h2>';
  data += '<p>Track: ' + student.track + '</p>';
  data += '<p>Points: ' + student.points + '</p>';
  data += '<p>Achievements: ' + student.achievements + '</p>';
  return data;
}

while (true) {
  search = prompt('Please type in student name or "quit" to exit the program.');
  search.toLowerCase();
  if (search === 'quit') {
    break;
  }

  for (var i = 0; i < students.length; i += 1) {
    student = students[i];
    if (search === student.name.toLowerCase()) {
      message = printStudentData(student);
      print(message);
    }
  }

  print("Sorry we could not find " + search + " in our database."); 

}