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 attrib-
utes(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)
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