Which one of the following is valid Identifier Var1 1Var Var 1 Var@1 Var_1 WHY?? REASONS PLEASE
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An Identifier can only have alphanumeric characters(a-z , A-Z , 0-9) and underscore( _ ). The first character of an identifier can only contain alphabet(a-z , A-Z) or underscore ( _ ). Identifiers are also case sensitive in C. For example name and Name are two different identifiers in C.
A valid identifier can have letters (both uppercase and lowercase letters), digits and underscores. The first letter of an identifier should be either a letter or an underscore. There is no rule on how long an identifier can be.
Explanation:
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