What is keywords ? 

Key words is a reserved word whose meaning already defined in the compiler. 


There are 32 types of keywords .

1. Int

2.char

3.float

4.double

5.void

6.auto

7.register

8.return

9. Extern

10.goto

11.break

12.continue

13.do

14.switch

15.case

16.while

17.for

18.const

19.if 

20.else

21.enum

22.signed

23.unsigned

24.static

25.size of

26.short

27.struct

28.union

29.typedef

30.vdatile

31.default

32.long

C language is a case sensitive language so all keywords should be written in lowercase .



In C language, a keyword is a reserved word that has a special meaning and purpose in the language. Keywords cannot be used as variable names or identifiers in a program.


Here is a list of C language keywords:


auto

break

case

char

const

continue

default

do

double

else

enum

extern

float

for

goto

if

int

long

register

return

short

signed

size of

static

struct

switch

typedef

union

unsigned

void

volatile

while

These keywords are used to define program structure, data types, loops, and other programming constructs. It is important to note that you cannot use these keywords as variable names or identifiers in your program, as they are reserved for specific purposes in the C language.




"auto": This keyword is used to define automatic variables, which are local variables that are automatically created and destroyed when a function is called and returned, respectively.


"const": This keyword is used to define constants, which are variables whose value cannot be changed during the execution of the program.


"for": This keyword is used to create a loop that iterates a fixed number of times, with a specified starting value, condition, and increment.


"if": This keyword is used to create a conditional statement that executes a block of code if a specified condition is true.


"int": This keyword is used to define integer variables, which are variables that can hold whole number values.


"Return": This keyword is used to return a value from a function to the calling program.


"size of": This keyword is used to determine the size of a variable or data type in bytes.


"while": This keyword is used to create a loop that continues to execute a block of code while a specified condition is true.


These are just a few examples of the many keywords in the C language. Each keyword has a specific purpose and is used to define different elements of a C program. It is important to understand the role and usage of each keyword to write effective and efficient C programs.