difftime(3)                Library Functions Manual                difftime(3)

NAME
       difftime - calculate time difference

LIBRARY
       Standard C library (libc, -lc)

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 time is a
       count of seconds.

       difftime(b, a) acts like (b-a) except that the result does not overflow
       and is rounded to double.

ATTRIBUTES
       For an explanation of the terms used in this section, see
       attributes(7).

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |difftime ()                                 | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDS
       C11, POSIX.1-2008.

HISTORY
       POSIX.1-2001, C89, SVr4, 4.3BSD.

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

Linux man-pages 6.7               2023-11-11                       difftime(3)