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js四舍五入
Snowwolf · 2010-03-22 · via 博客园 - Snowwolf

js中可以使用Math.round实现整数的四舍五入,如果需要实现精确到小数点多少位则需要编写函数了。

function ForDight(Dight,How) {
   Dight = Math.round(Dight*Math.pow(10,How))/Math.pow(10,How);
   return Dight;
}   


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