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REAL function, the
KIND= value of the type being that of argument A.
REAL; scalar; INTENT(IN).
Intrinsic groups: (standard FORTRAN 77).
Returns A with the fractional portion of its magnitude truncated and its sign preserved. (Also called "truncation towards zero".)
See ANInt Intrinsic, for how to round to nearest whole number.
See Int Intrinsic, for how to truncate and then convert