C language can the first letter of the Identifier be Underscore? – InterviewSolution

1.	C language can the first letter of the Identifier be Underscore?
Answer» identifier can be SUPPOSED the letter ( both under CASE and lower case letters ) , DIGIT and under score _ only . the first letter of identifier should be either a letter or an under score. but , it is discouraged to start an identifier name with an UNDERSCORE though it is legal

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