Double

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Double

Standard data type: 64 bit floating point

Syntax

Dim variable As Double

Description

Double is a 64-bit, floating-point data type used to store more precise decimal numbers. They can hold positive values in the range 4.940656458412465e-324 to 1.797693134862316e+308, or negative values in the range -4.940656458412465e-324 to -1.797693134862316e+308, or zero (0). They contain at most 53 bits of precision, or about 15 decimal digits.

Doubles have a greater range and precision than Singles, they still have limited accuracy which can lead to significant inaccuracies if not used properly. They are dyadic numbers - i.e. they can only accurately hold multiples of powers of two, which will lead to inaccuracies in most base-10 fractions.

Remarks

Differences from QB

• None

See also

• Single Less precise float type
• CDbl
• Table with variable types overview, limits and suffixes

Examples

'Example of using a double variable.

Dim a As Double

a = 1.985766472453666

Print a

Sleep

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Category: Mathematical Functions
Kind: keyword

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