difftime - Man Page

Standard C library (libc, -lc)

#include <time.h>

double difftime(time_t time1, time_t time0);

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.

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

C11, POSIX.1-2008.

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

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

ctime(3), jctime(3).