How to check if two elements are present in an array at once?

I have two variables x and y they have numbers say,1 and 3. I want to check if these two numbers are not existing in an array named used1

If they (x and y) are not existing in the array, then my values x and y must be stored in used1. (because they weren't existing here before).

Currently using

If used1(:)~=x(:),y(:)

But it's only checking for value of x

If either of the values exist in this array, it should check in the next else if statement.

Answer 1

[Awais Saeed]

clc;clear all;close all;
x = [1 5];
y = 2;
used1 = [9 10];
A = [x y];  % concatenate x and y to check at once
used1 = [used1 A(find(~ismember(A,used1)))] % store un-used values in used1 arary

used1 = 1×5

9 10 1 5 2