EvenQ

EvenQ[expr] gives True if expr is an even integer, and False otherwise.

Examples

Test if a number is even:

EvenQ[4]
(* True *)

EvenQ[7]
(* False *)

Filter even numbers from a list:

Select[Range[10], EvenQ]
(* {2, 4, 6, 8, 10} *)

Please visit the official Wolfram Language Reference for more details.