CDBL

Syntax

CDBL(X)

Versions: Extended, Disk

Description

Converts X to a double-precision floating-point number. Double-precision numbers have approximately 16 digits of precision and range from approximately ±2.938736×10^-308 to ±1.797693×10^308.

If X is a single-precision number or integer, it is converted to double-precision format. If X is a string representation of a number, it is converted to double-precision format.

Example

10 A! = 123.456!
20 B# = CDBL(A!)
30 PRINT A!, B#
RUN
123.456  123.456
Ok

10 PRINT CDBL(5)
RUN
5
Ok

Notes

• Single-precision numbers use ! as a type suffix
• Double-precision numbers use # as a type suffix
• Converting from single to double precision preserves all available precision

See Also

• CINT - Converts X to an integer by rounding the fractional portion
• CSNG - Converts X to a single-precision floating-point number
• FIX - Returns the truncated integer part of X
• INT - Return the largest integer less than or equal to a number (floor function)