C Identifiers

Definition:

Identifiers are sequences of characters used for naming variables, functions, new data types, and preprocessor macros. 

Rules:

  • Identifier can be include letters uppercase(A-Z) and lowercase(a-z)
  • Identifier can be decimal digits(0-9). 
  • The first character of an identifier cannot be a digit. 
  • You Can Include underscore character ?_? in identifiers.The first character of an identifier cannot be an underscore(Some Compilers Accept underscore as a first Character). 
  • Lowercase letters and uppercase letters are distinct, such that foo and FOO are two different identifiers. 
  • When using GNU extensions, you can also include the dollar sign character ?$? in identifiers.

Syntax

data_type name_of_identifeir // Variable name

data_type name_of_function(......) // function name

Identifiers Example

// Variable
int amount;
char name[20];

// Function
void calculation(int a,int b){
}

 


C Basics

  1. C Introduction
  2. C Character Set
  3. C History
  4. C Specific Properties and Implementation
  5. Hello World - Simple C Program
  6. C Identifiers
  7. C Reserve Words
  8. Escape Sequences In C

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