Accidently got this to work. HELP

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

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

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

function listOfStudents() {
  for(var i = 0; i < students.length; i++)
    var studentList = student[i]; //why does changing this var to studentList make it work?
    message += '<p> ' + student.name + ' </p>';
  return message;

}




while (true) {
  search = prompt('Search student records by typing name [Jody] (or type "quit" to end)');
  if (search === null || search.toLowerCase() === 'quit' ){
    break;
  } 
  search = search.toLowerCase();


    for (var i = 0; i < students.length; i++) {
    student = students[i];
      if (student.name.toLowerCase() === search) {
        message = getStudentReport( student );
        print(message);
      } else if ( search.toLowerCase() === 'list') {
        message = listOfStudents();
        print( message );
      }

      else if ( search.indexOf() === -1 && search !== 'list' ) {
       message = '<p>Sorry ' + search + ' is not a student</p>';
        print(message);
      }


  }
}



print(message);