The main documentation of the Get_CPU_Time Procedure contains additional explanation of this code listing.
function Get_CPU_Time ()
! Output variable.
type(real) :: Get_CPU_Time ! CPU time counter in seconds.
!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
! Verify requirements - none.
! Intrinsic F95 call to get cpu time info.
call CPU_TIME (Get_CPU_Time)
! Verify guarantees - none.
return
end function Get_CPU_Time