How to multiply in Javascript? problems with decimals

Question

i've the following code in Javascript:

var m1 = 2232.00; var percent = (10/100); var total = percent*m1; alert(total); 

The problem is that the variable "total" gives me "223.20000000000002" and it should be "223.2", what should i do to get the correct value?

Answer 1

.toFixed() is best solution.It will keep only two digits after dot.

Exp 1:

var value = 3.666; value.toFixed(2); //Output : 3.67 

Exp 2:

var value = 3.0000; value.toFixed(2); //Output : 3.00 

Answer 2

You can't get the exact value. This is the fundamental problem with floating-point numbers.

You can force a fixed number of decimal numbers with toFixed:

alert(total.toFixed(2)); 

However, keep in mind that this will leave trailing zeroes, which you might not want. You can remove them with .replace(/0+$/,'');