C Language | Tokens

* C tokens are the basic building blocks in C language which are constructed together to write a C program.

* These are the smallest, non-reducible, textual elements in a program.

* example:
int a ;
(this statement consist of 3 tokens)

* The compiler recognizes them for building up expressions and statements.

* A “C” language program is a collection of tokens, comments, and white spaces. C language includes the following five types of tokens.

In C language we have following tokens:

* Keywords
   examples:
  int, float, char, while

* Identifiers/ Variables
  examples:
  balance, calculate, salary, total, abc, xyz

* Literals / Constants
  examples:
  10, 23, 45.76, 345.65, “Hello”, “World”, ‘A’, ‘Z’

* Separators / Punctuators
  example:
  ( ), { }, *, /, – , :

* Operators
   example:
   +, -, *, /, &&, ||, !

Example:

int main()
{
   int a, b, sum;
   a = 10, b = 20;
   sum = a + b;
   printf ("Sum = %d \n", sum);
}

where,

main – identifier

{,}, (,) – delimiter

int – keyword

a, b, sum – identifier

main, {, }, (, ), int, a, b, sum – tokens

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