双精度浮点数 Double-precision floating-point format
（重定向自Double float）
双精度浮点数（double）是计算机使用的一种数据型别。比起单精度浮点数，双精度浮点数(double)使用 64 位（8字节） 来保存一个浮点数。
它可以表示十进制的15或16位有效数字，其可以表示的数字的绝对值范围大约是![[ 2.23 \times 10^{-308} , \text{1.79} \times 10^{308} ]](/uploads/202501/09/871ae3cee93341915bc87138626ea8840520.png)
。
Double float
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Double-precision floating-point format 双精度浮点数
（重定向自Double float）
Double-precision floating-point format is a computer number format that occupies 8 bytes (64 bits) in computer memory and represents a wide, dynamic range of values by using a floating point.
Double-precision floating-point format usually refers to binary64, as specified by the IEEE 754 standard, not to the 64-bit decimal format decimal64.
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