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difftime(3)
NAME
  difftime - Compares time values

LIBRARY
  Standard C Library (libc.so, libc.a)

SYNOPSIS
  #include <time.h>

  double difftime(
	  time_t time1,
	  time_t time2);

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  difftime():  XPG4, XPG4-UNIX

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

PARAMETERS
  time1	    Specifies a time value expressed in seconds.

  time2	    Specifies a time value expressed in seconds.

DESCRIPTION
  The difftime() function returns a signed time value in seconds that is the
  difference between the values of the time1 and time2 parameters, also
  expressed in seconds.

NOTES
  The difftime() function is supported for multithreaded applications.

RETURN VALUES
  Upon successful completion the difftime() function returns a value,
  expressed in seconds, that is the difference between the values of
  parameters time1 and time2.

RELATED INFORMATION
  Functions: ctime(3), time(3), timezone(3)

  Standards: standards(5)