Discussion on the accuracy of parseFloat() method in javascript_javascript skills

The parseFloat() method in Javascript will cause accuracy problems

Copy code The code is 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("
")
document.write("a b c=" sum2)

A, b, c are added together It was originally 1.3921, but the result obtained by sum1 is: 1.3921000000000001. This is not the desired result, especially when calculating money, such precision is not required. You can use the toFixed(n) method to correct it (n is the precise number of digits after the decimal).

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