https://code-reference.com/ 2026-04-08T12:47:14+02:00 https://code-reference.com/ https://code-reference.com/ttps://code-reference.com/lib/tpl/dokuwiki/images/favicon.ico text/html 2013-01-22T13:01:53+02:00 https://code-reference.com/c/keywords/auto?rev=1358856113&do=diff since C 89 The auto keyword defines a local variable as having a local lifetime. As the local lifetime is the default for local variables it's extremely rarely used. Note: GNU C extends the auto keyword to allow forward declaration of nested functions. text/html 2024-02-16T01:06:01+02:00 https://code-reference.com/c/keywords/bool?rev=1708041961&do=diff see _Bool text/html 2024-02-16T01:06:01+02:00 https://code-reference.com/c/keywords/break?rev=1708041961&do=diff The break keyword causes loops to end and is used in switch statements to end a case. Syntax break; text/html 2013-01-22T13:03:50+02:00 https://code-reference.com/c/keywords/case?rev=1358856230&do=diff since C 89 -> control structures switch text/html 2013-01-22T13:04:11+02:00 https://code-reference.com/c/keywords/char?rev=1358856251&do=diff since C 89 -> datatypes char text/html 2024-02-16T01:06:01+02:00 https://code-reference.com/c/keywords/const?rev=1708041961&do=diff The const keyword is used to denote something is constant. It prohibits any future assignments to the variable or pointer. Syntax const type variable-name [ = value]; text/html 2013-01-22T13:05:39+02:00 https://code-reference.com/c/keywords/continue?rev=1358856339&do=diff The continue keyword causes the rest of the current loop iteration to be skipped, and the next one to be evaluated and run like normal. since C 89 Syntax continue; -> control structures continue text/html 2024-02-16T01:06:02+02:00 https://code-reference.com/c/keywords/default?rev=1708041962&do=diff see switch text/html 2024-02-16T01:06:00+02:00 https://code-reference.com/c/keywords/do?rev=1708041960&do=diff see while text/html 2024-02-16T01:06:01+02:00 https://code-reference.com/c/keywords/double?rev=1708041961&do=diff see double text/html 2024-02-16T01:06:02+02:00 https://code-reference.com/c/keywords/else?rev=1708041962&do=diff see else text/html 2024-02-16T01:05:59+02:00 https://code-reference.com/c/keywords/enum?rev=1708041959&do=diff see enum text/html 2024-02-16T01:06:00+02:00 https://code-reference.com/c/keywords/extern?rev=1708041960&do=diff description of extern extern is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of extern c example no example at the moment text/html 2024-02-16T01:06:02+02:00 https://code-reference.com/c/keywords/false?rev=1708041962&do=diff description of false false is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of false c example no example at the moment text/html 2024-02-16T01:05:59+02:00 https://code-reference.com/c/keywords/file?rev=1708041959&do=diff FILE FILE Pointer (stream) shows on a given file The data type FILE is a structure that contains information about a file or specified data stream. It includes such information as a file descriptor, current position, status flags, and more. It is most often used as a pointer to a file type, as file I/O functions predominantly take pointers as parameters, not the structures themselves (see example below). C Sourcecode Example #include <stdio.h> /* including standard library */ //#inclu… text/html 2024-02-16T01:05:59+02:00 https://code-reference.com/c/keywords/float?rev=1708041959&do=diff see float text/html 2024-02-16T01:06:00+02:00 https://code-reference.com/c/keywords/for?rev=1708041960&do=diff see see for text/html 2024-02-16T01:06:00+02:00 https://code-reference.com/c/keywords/goto?rev=1708041960&do=diff see goto text/html 2024-02-16T01:06:02+02:00 https://code-reference.com/c/keywords/if?rev=1708041962&do=diff see Control Structures if text/html 2024-02-16T01:06:03+02:00 https://code-reference.com/c/keywords/inline?rev=1708041963&do=diff description of inline inline is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of inline c example no example at the moment text/html 2024-02-16T01:06:03+02:00 https://code-reference.com/c/keywords/int?rev=1708041963&do=diff see int text/html 2024-02-16T01:06:02+02:00 https://code-reference.com/c/keywords/long?rev=1708041962&do=diff see long text/html 2013-01-13T17:10:54+02:00 https://code-reference.com/c/keywords/null?rev=1358093454&do=diff NULL A Macro (NULL Pointer constant) does not point anywhere either 0, 0L, or (void *)0 text/html 2024-02-16T01:05:59+02:00 https://code-reference.com/c/keywords/register?rev=1708041959&do=diff description of register register is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of register c example no example at the moment text/html 2024-02-16T01:06:00+02:00 https://code-reference.com/c/keywords/return?rev=1708041960&do=diff see return text/html 2024-02-16T01:06:00+02:00 https://code-reference.com/c/keywords/short?rev=1708041960&do=diff see short text/html 2024-02-16T01:06:00+02:00 https://code-reference.com/c/keywords/signed?rev=1708041960&do=diff see signed text/html 2024-02-16T01:06:01+02:00 https://code-reference.com/c/keywords/sizeof?rev=1708041961&do=diff see sizeof text/html 2024-02-16T01:06:00+02:00 https://code-reference.com/c/keywords/static?rev=1708041960&do=diff description of static static is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of static c example no example at the moment text/html 2013-01-13T17:11:35+02:00 https://code-reference.com/c/keywords/stdout?rev=1358093495&do=diff stdout Pointer to a type FILE C Sourcecode Example #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main ( void ) { int c=66; fputc(c, stdout); return 0; } output ./stdout.c B text/html 2024-02-16T01:06:03+02:00 https://code-reference.com/c/keywords/switch?rev=1708041963&do=diff see switch text/html 2024-02-16T01:06:02+02:00 https://code-reference.com/c/keywords/union?rev=1708041962&do=diff create groups of variables which share the same storage space. a union is similar to a struct, but it allows you to define variables that share storage space union [union-type-name] { type variable-names; type variable-names; ... } [union-variables] ; text/html 2024-02-16T01:06:00+02:00 https://code-reference.com/c/keywords/unsigned?rev=1708041960&do=diff see unsigned text/html 2024-02-16T01:06:03+02:00 https://code-reference.com/c/keywords/void?rev=1708041963&do=diff see void text/html 2024-02-16T01:06:01+02:00 https://code-reference.com/c/keywords/volatile?rev=1708041961&do=diff description of volatile volatile is in work by code-reference.com if you are faster... don't hasitate and add it no example at the moment output of volatile c example no example at the moment text/html 2024-02-16T01:06:01+02:00 https://code-reference.com/c/keywords/while?rev=1708041961&do=diff see while