chop unused decimals with javascript

Question

I\'ve got a currency input and need to return only significant digits. The input always has two decimal places, so:

4.00  ->  4
4.10  ->  4.1
4.01  ->           


        

Answer 1

So you're starting with a string and you want a string result, is that right?

val = "" + parseFloat(val);

That should work. The more terse

val = "" + +val;

or

val = +val + "";

would work as well, but that form is too hard to understand.

How do these work? They convert the string to a number then back to a string. You may not want to use these, but knowing how the JavaScript conversions work will help you debug whatever you do come up with.