C CHARACTER SET

• The characters can be used to form words, numbers , statements and expressions

• The characters in C are grouped into four categories :

1. Letters / Alphabets : used for naming variables (identifiers) and keywords 
2. Digits : used for forming numerical constants and naming variables
3. Special Symbols : used as operators
4. White Spaces  

 

• One or more characters grouped together form basic elements of C known as tokens which are used for building declarations, statements and expressions etc.