Discussion on the accuracy of JavaScript parsefloat () method _javascript Skills

Parsefloat () method in JavaScript produces precision problems

Copy Code code as follows:

<script language= "JavaScript" >
var a = "0.11";
var b = "0.2801";
var c = "1.002";
var sum1 = parsefloat (a) + parsefloat (b) + parsefloat (c);
var sum2 = (parsefloat (a) + parsefloat (b) + parsefloat (c)). ToFixed (4)
document.write ("a+b+c=" + sum1);
document.write ("<br/>")
document.write ("a+b+c=" + sum2)
</script>

The A,b,c addition would have been 1.3921, but the sum1 result was: 1.3921000000000001, this is not the desired result, especially when calculating money, do not need such precise precision. You can use the tofixed (n) method to fix (n is the exact number of digits after a decimal).

For example: parsefloat (1.392143). toFixed (2) = 1.39.