ValueQ
ValueQ[expr] gives True if a value has been defined for expr, and gives False otherwise.
Examples
x = 5;
ValueQ[x]
(* True *)ValueQ[y]
(* False *)Please visit the official Wolfram Language Reference for more details.
WLJS NotebookWLJS NotebookValueQ[expr] gives True if a value has been defined for expr, and gives False otherwise.
x = 5;
ValueQ[x]
(* True *)ValueQ[y]
(* False *)Please visit the official Wolfram Language Reference for more details.