SyntaxQ

SyntaxQ["string"] returns True if the string corresponds to syntactically correct input for a single Wolfram Language expression, and returns False otherwise.

SyntaxQ["string", form] uses interpretation rules corresponding to the specified form.

Examples

Check valid syntax:

SyntaxQ["1 + 2"]
(* True *)

Invalid syntax:

SyntaxQ["1 + "]
(* False *)

Please visit the official Wolfram Language Reference for more details.