DOUBLE

DOUBLE type floating point numerical values use 8 bytes per value.

Syntax

DIM variable AS DOUBLE

Description

• Literal or variable values can range up to 15 decimal point places.
• The variable suffix type is #.
• Use DOUBLE and _FLOAT variables sparingly as they use a lot of program memory.
• Values returned may be expressed using exponential or scientific notation using E for SINGLE or D for DOUBLE precision.
• Floating decimal point numerical values cannot be _UNSIGNED.
• Values can be converted to 8 byte ASCII string values using _MKD$ and back with _CVD.
• When a variable has not been defined or has no type suffix, the value defaults to SINGLE.
• Warning: QBasic keyword names cannot be used as numerical variable names with or without the type suffix.

QBasic/QuickBASIC

• Results of mathematical calculations may be approximate or slow in QuickBASIC 4.5.

See also

• DIM, DEFDBL
• MKD$, CVD
• SINGLE, _FLOAT
• LEN
• Variable Types

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