CVD                      Convert String to Double-Precision

 y# = CVD(8-byte-string)

    Converts an eight-byte string expression to a double-precision number.

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      Notes:    Because of the way Turbo Basic stores numbers in random
                access files, numbers have to be converted to strings
                before they can be written to disk; when read from the
                disk, they must be reconverted from strings to numbers.

                A double-precision real number must be converted to a
                string (via MKD$) before being stored in a random access
                file. To retrieve such a number, first assign it to a file
                buffer field (with GET), then use CVD.