java中双精度乘法的精度?
java中双精度值的乘法运算符的保证精度是多少?
例如,2.2 * 100 是 220.00000000000003,但 220 是双精度数。 220.00000000000003 是 220 之后的下一个双精度值。
What is the guaranteed accuracy of multiplication operator for double values in java?
For example, 2.2 * 100 is 220.00000000000003, but 220 is a double number. 220.00000000000003 is the next double after 220.
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乘法工作正常,但
2.2
不能精确地表示为双精度。最接近的双精度数是:某些软件会将后一个值打印为
2.2
,但这并不意味着它是准确的。这只是意味着它被视为“足够接近”。The multiplication is working fine, but
2.2
cannot be represented exactly as a double. The closest doubles are:Some software will print the latter value as
2.2
, but that doesn't mean it's exact. It just means it's treated as "close enough".