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C Identifiers

Declaration & Assignments




C Identifiers
Identifiers are names given to different names given to entities such as constants, variables, structures, functions etc.
Example:
int amount;
 
double totalbalance;
In the above example amount and totalbalance are identifiers and int and double are keywords.

Rules for Naming Identifiers

·         An identifier can only have alphanumeric characters (a-z , A-Z , 0-9) (i.e. letters & digits) and underscore( _ ) symbol.
·         Identifier names must be unique
·         The first character must be an alphabet or underscore.
·         You cannot use a keyword as identifiers.
·         Only first thirty-one (31) characters are significant.
·         Must not contain white spaces.
·         Identifiers are case-sensitive.

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