11.5 Execution control

• [6.2] The expression in an ERROR STOP or STOP statement can be non-constant. It is still required to be default Integer or default Character.
• [6.2] The ERROR STOP and STOP statements now have an optional QUIET= specifier, which is preceded by a comma following the optional stop-code. This takes a Logical expression; if it is true at runtime then the STOP (or ERROR STOP) does not output any message, and information about any IEEE exceptions that are signalling will be suppressed. For example,

      STOP 13, QUIET = .True.
  

  will not display the usual ‘STOP: 13’, but simply do normal termination, with a process exit status of 13. Note that this means that the following two statements are equivalent:

      STOP, QUIET=.True.
      STOP 'message not output', QUIET=.TRUE.