How to make a radio button quiz

HOW TO MAKE A RADIO BUTTON QUIZ USING HTML, JAVASCRIPT, AND CSS

This lesson will be about learning how to make a simple radio button quiz with a score. The code is not going to have the <form></form> tags, because I used the arrays instead, which is inside of <script></script>.

The quiz is going to have only 3 questions and 3 options for each question. Once you get the idea, you can add more questions and more points to each question. Remember, var z is going to be the variable to add all the 3 scores of a, b, and c.

Code:
_______________________________________________________________
<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title>Radio Button Quiz</title>
</head>
<body>
    <style>
        #frame001 {
            height: 400px;
            width: 400px;
            background-color: white;
            border: 3px solid black;
            margin: 4px;
            padding: 4px;
            border-radius: 10px;
        }

        #center001 {
            text-align: center;
            color: black;
        }
    </style>
    <div id="frame001">
        <div id="center001">
            <h2>Radio Button Quiz</h2>
            <hr />
            <p id="message001"></p>
            <p id="options001"></p>
            <p id="comment001"></p>
            <p id="click001"></p>
        </div>
    </div>

    <script>
        var question001 = ["What is 1 + 1?"];
        var choices001 = ["<input onclick=correct001() name=button001 type=radio />2<br /><input onclick=incorrect001() name=button001 type=radio />4<br /><input onclick=incorrect001() name=button001 type=radio />7<br />"];

        var question002 = ["What is 2 + 2?"];
        var choices002 = ["<input onclick=incorrect002() name=button002 type=radio />3<br /><input onclick=correct002() name=button002 type=radio />4<br /><input onclick=incorrect002() name=button002 type=radio />5<br />"];

        var question003 = ["What is 3 + 3?"];
        var choices003 = ["<input onclick=incorrect003() name=button003 type=radio />8<br /><input onclick=incorrect003() name=button003 type=radio />5<br /><input onclick=correct003() name=button003 type=radio />6<br />"];
        var a;
        var b;
        var c;
        var z;

        window.onload = function() {
            a = 0;
            message001.innerHTML = question001;
            options001.innerHTML = choices001;
            click001.innerHTML = "<button onclick=set002()>Submit</button>";
        }

        function correct001() {
            a = 1;
        }

        function incorrect001() {
            a = 0;
        }

        function set002() {
            b = 0;
            message001.innerHTML = question002;
            options001.innerHTML = choices002;
            click001.innerHTML = "<button onclick=set003()>Next</button>";
        }

        function correct002() {
            b = 1;
        }

        function incorrect002() {
            b = 0;
        }

        function set003() {
            c = 0;
            message001.innerHTML = question003;
            options001.innerHTML = choices003;
            click001.innerHTML = "<button onclick=result001()>Score</button>";
        }

        function correct003() {
            c = 1;
        }

        function incorrect003() {
            c = 0;
        }

        function result001() {
            z = a + b + c;
            message001.innerHTML = "End of Quiz";
            options001.innerHTML = "";
            comment001.innerHTML = "Your score is: " + z;
            click001.innerHTML = "<button onclick=repeat001()>Repeat</button>";
        }

        function repeat001() {
            location.reload();
        }
    </script>
</body>
</html>

Here is a video of the above code.

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