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HumbleApprentice

JavaScript for loop problem

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Hi Guys,
I am teaching myself JavaScript. This little program works but I am unable to pass the result to onclick. Could you please help. Thanks.
<!doctype html>
<html>
<h2> 12 Times Table </h2>
<script>
function 12Times()
{
var times=1
for (times =1;times<=12; times++)
alert(times + " times 13 is " +(times * 13) + "<br>");
}
</script>
<body>
<input type="button" onclick="12Times()" value="12Times">
</body>
</html>

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Hello,

 

It looks like you're missing the opening and closing braces { } for the for loop.

 

Also to note, the times variable, you can set it inside the for loop instead, like this: for(var times = 1; times <= 12; times++)

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Sorry, I thought it might be better without a for-loop for this. The tutorial for-loop is here...

 

http://www.w3schools.com/js/tryit.asp?filename=tryjs_loop_for_ex

 

You shouldn't begin any identifiers with a number, so id's or function names or variable names should start with a letter. Use something like f12 rather than 12f.

<!DOCTYPE html><html><head><title>13</title><script>window.onload = init;var times;function init() {times = 1; out = document.getElementById('out');document.getElementById('btn').onclick = times13; }function times13(){ if (times <= 13){out.innerHTML += times + " times 13 is " + (times * 13) + "<br/>";times++;}else{times = 1;out.innerHTML = '';}} </script></head><body><h2> 13 Times Table </h2><input type="button" id="btn" value="13Times"/><br/><br/><div id="out"></div> </body></html>
Edited by davej

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Thanks DaveJ.

 

Your respond was very helpful.

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