REAL; scalar; INTENT(OUT).
Returns the process's runtime in seconds in Seconds--the same value
as the UNIX function
On some systems, the underlying timings are represented using types with sufficiently small limits that overflows (wraparounds) are possible, such as 32-bit types. Therefore, the values returned by this intrinsic might be, or become, negative, or numerically less than previous values, during a single run of the compiled program.
This routine is known from Cray Fortran. See CPU_Time Intrinsic, for a standard equivalent.
For information on other intrinsics with the same name: See Second Intrinsic (function).