Keywords in C Programming Language

What are Keywords ?

In C programming language some words are predefined and keywords have specific meaning to compiler in c program . These words can not used as name of variables and functions, there are 32 keywords in c language and compiler will show error if any keyword is used in program as variable name because Keywords have a special meaning to compiler.

Keywords in c

32 Keywords in  c

List of keywords in C Language

auto             do          goto               signed                    unsigned                   break           double             if               sizeof

void              case             else         int                    static                   volatile           char         enum            long        struct

while            const            extern             register              switch                continue       float          return         typedef

default         for              short                   union

all above 32 words are reserved or predefined as keywords in c and having certain meaning so during program execution keywords work with predefined supposed for keyword is used in c program and for will work as loop.

Use of Keywords in C

Keywords example in c

 

          #include<stdio.h>

                void main(){
int i;

            for(i = 0; i < 10; i++)    // for is a keyword
{
printf(“%d\n”, i);
}
}

 

Keyword in c language

Some Keywords added in the C99 Standard

_Bool        _Complex            _Imaginary          inline       restrict

C11 Standard Keywords

_Alignas      _Alignof             _Atomic         _Noreturn              _Static_assert           _Thread_local

Note

All these word can not be used as keywords or identifiers