Converting a string to a number

[LewisReeder]

I am creating a web application that requires the user to enter an amount for each day of the week. The numbers are entered into text boxes. I need to have a running total of all the numbers as they input each number. I am using the onchange event handler so each time they move off the boxes the total calculates and is displayed in a separate box. The problem I am having is that I am not able to convert the string to a number (1-3 digit number). I know this because when the total is displayed, each number is added as the next character in the string rather than creating a total. How can I convert my string to a number (with decimals)?

 

[shakespeare5677]

You should just google for stuff like that:

http://www.javascripter.net/faq/convert2.htm

 

[cLFlaVA]

check out the parseFloat() function.

*cLFlaVA
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[BabyJeffy]

Here's another (shorthand) way to cast a string into a number:

<script type="text/javascript">
var myString1 = "123.45";
var myString2 = "13.5";
alert((myString1-0) + (myString2-0)); // 136.95
</script>

By subtracting zero from a string, Javascript converts the string into the appropriate number format for you.

Cheers,
Jeff


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