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difftime

Section: C Library Functions (3)
Updated: 202-0-08
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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	M-Safe

STANDARDS

C11, POSIX.-2008.

HISTORY

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