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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 section 220.127.116.11 CPU_Time Intrinsic, for a standard equivalent.
For information on other intrinsics with the same name: See section 18.104.22.168 Second Intrinsic (function).
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