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Syntax
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Double
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Description
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A data type used to declare variables capable of holding real numbers with 15–16 digits of precision.
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Comments
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Double variables are used to hold numbers within the following ranges:
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Sign
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Range
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Negative
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–
1.797693134862315E308 <=
double
<=
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-4.94066E-324
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Positive
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4.94066E-324 <=
double
<= 1.797693134862315E308
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The type-declaration character for
Double
is #.
Storage
- Internally, doubles are 8-byte (64-bit) IEEE values. Thus, when appearing within a structure, doubles require 8 bytes of storage. When used with binary or random files, 8 bytes of storage are required.
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Each Double consists of the following
- A 1-bit sign
- An 11-bit exponent
- A 53-bit significand (mantissa)
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See Also
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Currency (data type); Date (data type); Integer (data type); Long (data type); Object (data type); Single (data type); String (data type); Variant (data type); Boolean (data type); DefType (statement); CDbl (function).
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CIMPLICITY