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原标题:How to make integer round off to hundredths place

在行动说明3中,我有用户进入一个领域,这个领域应具有现金价值。 如果出于某种原因,他们说20.956话,那么我怎么做呢?

最佳回答

您可使用toFixed(。 类似:

var cash:String = (Number("1.2365")).toFixed(2)

它没有在大脑中提及,而是相当肯定它会合而不是地板。

通知toFixed(>>>,如果你想要一个更加全面的助手,那么你可以使用下述东西。

    public function rounder(num:Number, decimalPlaces:int, method:Function = null):Number {
        if(method == null) method = Math.round;
        var mul:Number = Math.pow(10,decimalPlaces);
        return method(num * mul)/mul;
    }

使用:

rounder(1.245, 2); // returns 1.25  (it uses round by default)
rounder(1.245, 2, Math.floor); // returns 1.24
rounder(1.241, 2, Math.ceil); // returns 1.25

事实上,你也可以使用负数来处置错误。

rounder(2123, -1, Math.ceil); // returns 2130
问题回答

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