Double
Standard data type: 64 bit floating point
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.
Syntax
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.
Example
'Example of using a double variable.
Dim a As Double
a = 1.985766472453666
Print a
Sleep
Dim a As Double
a = 1.985766472453666
Print a
Sleep
Differences from QB
- None
See also
- Single Less precise float type
- CDbl
- Table with variable types overview, limits and suffixes