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    The following form allows you to view linux man pages.

    Command:

    difftime

    
    
    

    SYNOPSIS

           #include <time.h>
    
           double difftime(time_t time1, time_t time0);
    
    
    

    DESCRIPTION

           The  difftime()  function returns the number of seconds elapsed between
           time time1 and time time0, represented as a double.  Each of the  times
           is  specified  in calendar time, which means its value is a measurement
           (in seconds) relative to the Epoch, 1970-01-01 00:00:00 +0000 (UTC).
    
    
    

    ATTRIBUTES

       Multithreading (see pthreads(7))
           The difftime() function is thread-safe.
    
    
    

    CONFORMING TO

           SVr4, 4.3BSD, C89, C99.
    
    
    

    NOTES

           On a POSIX system, time_t is an arithmetic type,  and  one  could  just
           define
    
                  #define difftime(t1,t0) (double)(t1 - t0)
    
           when the possible overflow in the subtraction is not a concern.
    
    
    

    SEE ALSO

           date(1), gettimeofday(2), time(2), ctime(3), gmtime(3), localtime(3)
    
    
    

    GNU 2013-10-28 DIFFTIME(3)

    
    
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