AllTrue

AllTrue[{e1, e2, ...}, test] yields True if test[ei] is True for all elements.

AllTrue[test] represents an operator form that can be applied to an expression.

Examples

Check if all elements are positive:

AllTrue[{1, 2, 3, 4}, Positive]
(* True *)

Check if all are even:

AllTrue[{2, 4, 5, 8}, EvenQ]
(* False *)

Using operator form:

AllTrue[NumericQ][{1, 2.5, 3}]
(* True *)

Please visit the official Wolfram Language Reference for more details.