Ctime: Difference between revisions

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add note about time.h
Y2K was not an event
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{{lowercase|title=ctime}} ''For the c++ library <ctime>, see [[time.h]]''
 
In [[computing]], '''ctime''' is the number of seconds since 0:00:00 [[January 1]], [[1970]] [[UTC]]. Commonly stored as a 32 bit signed [[integer (computer science)|integer]], this number is used for pinpointing dates in many [[computer]]s and [[operating system]]s, such as [[Linux]] and [[Unix|UNIX]] variants, as well as some [[programming language]]s. For example, the function ctime() was included in [[ANSI C]]. It will [[arithmetic overflow|overflow]] in [[2038]] and cause the [[year 2038 problem]]; some expect this will be ana profitable non-event similar to [[Y2K]].
 
To determine the current '''ctime''' on a UNIX system, issue the command "<code>date +%s</code>".