Make a javascript quiz in under 15 lines of code, Very simple javascript quiz tutorial...

Hope you understand the code, i know how hard a single line of code can be when you don't get it, so go on and ask me any javascript question you want!!!

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Update: unfortunately, I have lost the code in the video. I should have added it in the description or at least linked to it. Lesson learned, though.

[piedpiper]

I am not able to get it to work. It always returns a value of 0 once i hit the submit button.
Could you offer some assistance? Below is the html code and the Javascript code.

HTML
<div>

<h2>Who lost his riches, health, friends, and family, but remained faithful to God in his afflictions?</h2>
<input id="first" type="radio" name="firstQuestion" value="false">Noah</input>
<input id="second" type="radio" name="firstQuestion" value="true">Job</input>
<input id="third" type="radio" name="firstQuestion" value="false">Moses</input>
<input id="fourth" type="radio" name="firstQuestion" value="false">Daniel</input>

<br>

<h2>What gave Samson his unusual strength?</h2>

<input id="fifth" type="radio" name="secondQuestion" value="false">Goliath</input>
<input id="sixth" type="radio" name="secondQuestion" value="false">Working out at the guy</input>
<input id="seventh" type="radio" name="secondQuestion" value="true">Hair</input>
<input id="eighth" type="radio" name="secondQuestion"

<br>

<h2>Who was the first man created on earth?</h2>

<input id="ninth" type="radio" name="thirdQuestion" value="false">Noah</input>
<input id="one" type="radio" name="thirdQuestion" value="true">Adam</input>
<input id="tenth" type="radio" name="thirdQuestion" value="false">Abraham</input>
<input id="eleventh" type="radio" name="thirdQuestion" value="false">Moses</input>

<br>

<h2>Who killed the giant Philistine, Goliath, and saved Israel from captivity?</h2>

<input id="twelfth" type="radio" name="fourthQuestion"
<input id="thirteenth" type="radio" name="fourthQuestion" value="true">David</input>
<input id="fourteenth" type="radio" name="fourthQuestion" value="false">Moses</input>
<input id="fifteenth" type="radio" name="fourthQuestion" value="false">Nathan</input>
<br>

<input type="button" value="Submit" onclick="submitted()"/>
</div>
<p id="firstParagraph"></p>
<p id="secondParagraph"></p>




<script type="text/javascript" src="app.js"></script>
</body>

</html>



Javascript portion

var firstQuestion =
var secondQuestion =
var thirdQuestion =
var fourthQuestion =

var myArr =[firstQuestion, secondQuestion, thirdQuestion, fourthQuestion];
var score = 0;
var firstParagraph =
var secondParagraph =

function submitted()
{
for(var i = 0;i<myArr.Length;i++)
{
for(var o = 0;o<firstQuestion.Length; o++)

{
if(myArr[i][o].value == "true" && myArr[i][o].checked)
{
firstParagraph.innerHTML = "You got question " + (i+ 1) + " correct!";
score++;
}
};
};

var showScore = Math.round((score/4)*100) ;
secondParagraph.innerHTML = showScore;
}

[oldguitarist-pl]

Hello, I like this quiz, could you send me the full code?

[Tk-sknv]

Hlo sir can you plz tell me which platform u use a run notepad Codding....bzc I had done the Codding but I have no results...and I'm run the code Google Chrome...but I had no results so plzz tell me sir

[piedpiper]

Im trying to get this to work but unable to. When i hit the submit button it just shows a value of 0.

Below is the HTML and the Javascript

HTML

<div>

<h2>Who lost his riches, health, friends, and family, but remained faithful to God in his afflictions?</h2>
<input id="first" type="radio" name="firstQuestion" value="false">Noah</input>
<input id="second" type="radio" name="firstQuestion" value="true">Job</input>
<input id="third" type="radio" name="firstQuestion" value="false">Moses</input>
<input id="fourth" type="radio" name="firstQuestion" value="false">Daniel</input>

<br>

<h2>What gave Samson his unusual strength?</h2>

<input id="fifth" type="radio" name="secondQuestion" value="false">Goliath</input>
<input id="sixth" type="radio" name="secondQuestion" value="false">Working out at the guy</input>
<input id="seventh" type="radio" name="secondQuestion" value="true">Hair</input>
<input id="eighth" type="radio" name="secondQuestion"

<br>

<h2>Who was the first man created on earth?</h2>

<input id="ninth" type="radio" name="thirdQuestion" value="false">Noah</input>
<input id="one" type="radio" name="thirdQuestion" value="true">Adam</input>
<input id="tenth" type="radio" name="thirdQuestion" value="false">Abraham</input>
<input id="eleventh" type="radio" name="thirdQuestion" value="false">Moses</input>

<br>

<h2>Who killed the giant Philistine, Goliath, and saved Israel from captivity?</h2>

<input id="twelfth" type="radio" name="fourthQuestion"
<input id="thirteenth" type="radio" name="fourthQuestion" value="true">David</input>
<input id="fourteenth" type="radio" name="fourthQuestion" value="false">Moses</input>
<input id="fifteenth" type="radio" name="fourthQuestion" value="false">Nathan</input>
<br>

<input type="button" value="Submit" onclick="submitted()"/>
</div>
<p id="firstParagraph"></p>
<p id="secondParagraph"></p>




<script type="text/javascript" src="app.js"></script>
</body>

</html>




Javascript


var firstQuestion =
var secondQuestion =
var thirdQuestion =
var fourthQuestion =

var myArr =[firstQuestion, secondQuestion, thirdQuestion, fourthQuestion];
var score = 0;
var firstParagraph =
var secondParagraph =

function submitted()
{
for(var i = 0;i<myArr.Length;i++)
{
for(var o = 0;o<firstQuestion.Length; o++)

{
if(myArr[i][o].value == "true" && myArr[i][o].checked)
{
firstParagraph.innerHTML = "You got question " + (i+ 1) + " correct!";
score++;
}
};
};

var showScore = Math.round((score/4)*100) ;
secondParagraph.innerHTML = showScore;
}

[jinx_ila]

I can't see all of the code clealy, and you don't show the top of the code, can you post it in the description, of make a download link?