My Solution To Dave's Bonus Challenge

// Declare variables.

var htmlStr;
var studentCheck;
var studentQuery;

// Declare function for printing text to "ouput" DIV.

function printHTML(htmlString) {
  var htmlOutput = document.getElementById('output');
  htmlOutput.innerHTML = htmlString;
}

// And now, the meat of this script...set up an infinite do-while loop.

do {

// Start our "htmlStr" variable with a clean slate, so that each search
// output overwrites the previous one.

    htmlStr = " ";

// Set the "studentCheck" variable to "false". This variable is used later
// to trigger our "student not found" message.

    studentCheck = false;

// Displays our search prompt and stores the results in the "studentQuery"
// variable.

    studentQuery = prompt("Search student records: type a name, or the word 'quit' to exit.");

// Creates an if condition--if the user types "quit", we break out of the
// loop. It's important this is included at the beginning of our do-while
// loop, as if it is missing, the program will otherwise return a "student
// not found error.

    if (studentQuery.toLowerCase() === 'quit') {
        break;
    }

// Creates a for loop that iterates through our array of student objects and
// checks to see if any match the value entered. If so, the "studentCheck"
// variable is set to "true", and   that student's info is added to the "htmlStr"
// variable and printed to the "output" DIV.

    for (var i = 0; i < students.length; i += 1) {
        if (studentQuery === students[i].name) {
            studentCheck = true;
            htmlStr += "<h2>Student: " + students[i]['name'] + "</h2>";
            htmlStr += "<p>Track: " + students[i]['track'] + "</p>";
            htmlStr += "<p>Points: " + students[i]['points'] + "</p>";
            htmlStr += "<p>Achievements: " + students[i]['achievements'] + "</p>";
            printHTML(htmlStr);
        }
    }

// One final conditional statement-- we check to see if we have iterated through
// our entire array. If we have AND no matches have been found, we add the
// "student not found" message to the "htmlStr" variable and print it to the
// "output" DIV.

    if (i >= students.length && studentCheck === false) {
        htmlStr = "<h2>That student does not exist.</h2>";
        printHTML(htmlStr);
    }

// The end of our do-while loop. We set the condition to "true" to make it infinite.

} while (true);