Question

How to make floating point arithmetic accurate in JavaScript

Answer 1

<script>
var x = 0.1 + 0.2;
document.write(x + "<br />");

var y = (0.1 * 10 + 0.2 * 10) / 10;
document.write(y + "<br />");
 
/*
run:
 
0.30000000000000004
0.3
 
*/
</script>

 

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