Relational operators always yield a TRUE or FALSE result. Remember that a TRUE result evaluates to any non-zero value (often 1), while a FALSE result evaluates only to zero. Relational operators have a lower precedence than the arithmetic operators.
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.