Punctuators

Punctuators can be any one of the following:

[	]	(	)	{	}		,	:	=	;	...
#

Depending on context, some of these punctuators can also be an operator or part of an operator. The pairs of punctuators [ ], ( ), and { } must match and appear in pairs after a source file is preprocessed. The punctuator # can only be part of preprocessing directive.