8.229 SLEEP — Sleep for the specified number of seconds

Description:
Calling this subroutine causes the process to pause for SECONDS seconds.
Standard:
GNU extension
Class:
Subroutine
Syntax:
CALL SLEEP(SECONDS)
Arguments:
SECONDS The type shall be of default INTEGER.
Example:
program test_sleep
  call sleep(5)
end

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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-4.9.3/gfortran/SLEEP.html