Double Data Type

Language Items List

Definition:

Double variables, also called double-precision floating-point variables, are 64-bit numbers requiring 8 bytes of storage. The floating-point number format allows for storage of fractional numbers. Double variables also require only a small amount of memory to store a large range of numbers.

Type-declaration character:

# (ANSI character 35)

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Note: Double-precision floating-point numbers include three parts: the sign, which requires one bit; the exponent, which requires 11 bits; and the mantissa, which uses the remaining 52 bits and an additional implied bit.

See Also:

Single Data Type
Data Types