html - Purpose of dividing by 1 javascript - Stack Overflow

I was working on a simple programming exercise my teacher gave us, and I noticed several times that in Javascript, I have to divide a number by 1, otherwise it will return a ridiculous value. Any explanations? I have a jsfiddle /

var widthrand=Math.floor(Math.random()*widthRange); width=widthrand + document.getElementById('width').value/1;

If you look at line 22, and take out the divide by 1, and click generate, it will return ridiculous lengths Thanks

I was working on a simple programming exercise my teacher gave us, and I noticed several times that in Javascript, I have to divide a number by 1, otherwise it will return a ridiculous value. Any explanations? I have a jsfiddle http://jsfiddle/TpNay/1/

var widthrand=Math.floor(Math.random()*widthRange); width=widthrand + document.getElementById('width').value/1;

If you look at line 22, and take out the divide by 1, and click generate, it will return ridiculous lengths Thanks

• javascript
• html
• math

Share Improve this question Follow edited Feb 15, 2013 at 1:38 John Conde 220k9999 gold badges463463 silver badges502502 bronze badges asked Feb 15, 2013 at 1:20 scrblnrd3scrblnrd3 7,43499 gold badges3636 silver badges6565 bronze badges

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Sorted by: Reset to default 11

It makes JavaScript type juggle forcing the value of document.getElementById('width').value to bee numeric.

A better way to do it would be parseInt(document.getElementById('width').value, 10)