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_INTEGER64 is an 8 byte number type definition that can hold whole numerical values.

Syntax

DIM variable AS _INTEGER64

Can be used in 32 or 64 bit computers.
Signed numerical values can range from -9223372036854775808 to 9223372036854775807.
_UNSIGNED _INTEGER64 values range from 0 to 18446744073709551615 on 64 bit computers.
Variable type suffix is && or ~&& for _UNSIGNED. Suffix can also be placed after a literal or hexadecimal numerical value.
Values can be converted to 8 byte ASCII character strings using _MK$ and back using _CV.
Equivalent to INT8 or unsigned as UINT8 in C programming.
When a variable has not been assigned or has no type suffix, the value defaults to SINGLE.