In C language the smallest unit of a program is called Token. Tokens are created using the C character set. These tokens are delimited from each other by white spaces just like words in English language are delimited by white spaces. The Syntax Rule of the C language dictates how to create tokens in C and how to use these tokens to create meaningful statements. C language has 5 types of tokens as shown in Figure – 1.
Figure – 1: Classification of Tokens in C Language