将 double 转换为 Int，向下舍入 [英] Convert double to Int, rounded down

问题描述

如何将 double 值转换为 int 执行以下操作:

How to convert a double value to int doing the following:

Double If x = 4.97542. Convert to int x = 4.

Double If x = 4.23544. Convert to int x = 4.

也就是说，答案总是向下取整.

That is, the answer is always rounding down.

推荐答案

如果显式cast double 为int，小数部分将被截断.例如:

If you explicitly cast double to int, the decimal part will be truncated. For example:

int x = (int) 4.97542;   //gives 4 only
int x = (int) 4.23544;   //gives 4 only

此外，您还可以使用 Math.floor() 方法对值进行四舍五入，以防您希望返回 double 值.

Moreover, you may also use Math.floor() method to round values in case you want double value in return.

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