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A simple way to get two or n digits after the decimal point of a number in JS

高洛峰
Release： 2016-12-09 11:52:29
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1262 people have browsed it

In js, sometimes it is necessary to get the two decimal places of a float number. 

var num=10/3;
function f(num,n){
    return parseInt(num*Math.pow(10,n)+0.5,10)/Math.pow(10,n);
  }
alert(f(num,2));
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