AllMatch

AllMatch[{e1, e2, ...}, form] yields True if ei matches the pattern form for all of the ei.

AllMatch[expr, form, level] tests parts of expr at level level.

AllMatch[form] represents an operator form of AllMatch that can be applied to an expression.

Examples

Check if all elements are positive:

AllMatch[{1, 2, 3, 4}, _?Positive]
(* True *)

Check if all elements are integers:

AllMatch[{1, 2, 3.5}, _Integer]
(* False *)

Please visit the official Wolfram Language Reference for more details.