Fundamentals of C Programming
An identifier is a name having a few letters , numbers and special type of character. It is used to identify a variable,function,symbolic constant. Am identifier can be written with a maximum of 31 characters.
C program has punctuation marks, keywords and operators as the smallest individual units are referred to as Tokens.
Keywords in C:
Note: All the keywords must be written in lower case.
Any unchanged value in a program during the program execution is called constant.
There mainly two types of Constants in C language.
1. Numeric Constants
2. String or Character Constant
Numeric Constants :
There are two types of numeric constants.
(i) Integer Constant
(ii) Real or floating-point constant