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Editorial Team
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Asked: 2026-05-21T09:37:22+00:00

I’m just learning javascript using a book and they give this example: <!DOCTYPE html

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I’m just learning javascript using a book and they give this example:

<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN”
“http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=”http://www.w3.org/1999/xhtml”>
<body>
<script language=”JavaScript” type=”text/javascript”>
var firstNumber = 15;
var secondNumber = 10;
var answer;
answer = 15 / 10;
alert(answer);
alert(15 / 10);
answer = firstNumber / secondNumber;
alert(answer);
</script>
</body>
</html>

When I load it, alert only pops up twice instead of three times. Why is this?

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1 Answer

  1. Editorial Team

    The quotes you were using are doing something wierd and preventing the code to run. Wasn’t getting any error just ignored…

    Anyway try this working fine in FF, Chrome and Safari:

    <html xmlns="http://www.w3.org/1999/xhtml">
<body>
<script language="JavaScript" type="text/javascript">
var firstNumber = 15;
var secondNumber = 10;
var answer;
answer = 15 / 10;
alert("1: " + answer);
alert("2: " + 15 / 10);
answer = firstNumber / secondNumber;
alert("3: " + answer);
</script>
</body>
</html>
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