Identifier C Language

Identifier is user defined name given to function, variable, structure, union, array etc. followings are rules to name an identifier.

• Name must be start with alphabet or underscores
• An identifier may have numbers but not used as first character
• Special symbol is not allowed .
• 
  

Valid Variable Name	Invalid Variable Name
A2	2A
_a	-a
A_B	A B
*a	A& (any special symbol)

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