What are keywords in C language

Definition: Keywords are words whose meaning has already been explained to compiler. We can not use keywords as variable name. Compiler will not allow to set a new  meaning to keyword.

There are 32 keywords in C language that are:

auto;
break;
case;
char;
const;
continue;
default;
do;
double;
else;
enum;
extern;
float;
for;
goto;
if;
int;
long;
register;
return;
short;
signed;
sizeof;
static;
struct;
switch;
typedef;
union;
unsigned;
void;
volatile;
while;