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双数据类型Double Data Type

office 365 dev account|上次更新日期: 2018/3/13
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双 (双精度浮点) 变量存储为 IEEE 64 位 (8 字节) 浮点数值范围从-1.79769313486231 e 308 到-4.94065645841247 e-324 负数值,并从 4.94065645841247 e-324 到对于正值 1.79769313486232 e 308。Double类型-声明字符是数字符号 ( # )。Double (double-precision floating-point) variables are stored as IEEE 64-bit (8-byte) floating-point numbers ranging in value from -1.79769313486231E308 to -4.94065645841247E-324 for negative values and from 4.94065645841247E-324 to 1.79769313486232E308 for positive values. Thetype-declaration character for Double is the number sign ( # ).

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