While loop problem - Using function to search for student. Appreciate any thoughts/solution.

var studentRecords = [{
  name: 'Andrew',
  track: 'Android',
  achievements: 0,
  points: 1000,
}, {
  name: 'Ian',
  track: 'iOS',
  achievements: 3,
  points: 30,
}, {
  name: 'Sarah',
  track: 'SQL',
  achievements: 58,
  points: 580,
}, {
  name: 'Joshua',
  track: 'JavaScript',
  achievements: 100,
  points: 1000,
}, {
  name: 'Peter',
  track: 'Python',
  achievements: 5698,
  points: 56980,
}, ];

var studentList = '';

function getAllStudentRecords() {

  for (var i = 0; i < studentRecords.length; i++) {
    var student = studentRecords[i];
    studentList += '<ul>';

    for (var prop in student) { // Generate list through loop
      studentList += '<li>' + prop.charAt(0).toUpperCase() + prop.substr(1).toLowerCase() + ': ' + student[prop] + '</li>';
    }
    studentList += '</ul>';
  }
  return studentList;
}

function getStudentByName(studentname) {

  for (var i = 0; i < studentRecords.length; i++) {
    var student = studentRecords[i];
    studentList += '<ul>';

    if (student.name === studentname) {
      for (var prop in student) { // Generate list through loop
        studentList += '<li>' + prop.charAt(0).toUpperCase() + prop.substr(1).toLowerCase() + ': ' + student[prop] + '</li>';
      }
    }
    studentList += '</ul>';
  }
  return studentList;
}

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


while (true) {
  var command = prompt("Type a name to show student record\nType GETALL to list all student records\nType Q to quit.");
  print(getStudentByName(command));
  if (command === null || command.toUpperCase() === 'Q') {
    break;
  } else if (command.toUpperCase() === 'GETALL') {
    print(getAllStudentRecords());
    break;
}