These are based on the IEEE 754 standard, which defines a binary standard for 32-bit floatingpoint and 64-bit double precisionfloatingpoint binary-decimal Numbers.
它们都依据IEEE 754标准,该标准为32位浮点和64位双精度浮点二进制小数定义了二进制标准。
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A more general synonym is the float type, which has an arbitrary floating-pointprecision that you specify when declaring the data type as float (val).