Validate that a calculation results in integer values.

A = randi(9)/randi(9);
mustBeInteger(A)

Error using mustBeInteger (line 14)
Values must be integer.

If the result of dividing the two random integers contains a fractional part, mustBeInteger issues an error.

classdef MyClass
   properties
      Prop1 {mustBeInteger}
   end
end

Create an object and assign a value to its property. The result of dividing two random integers can result in an integer or a number with a fractional part.

obj = MyClass;
obj.Prop1 = randi(9)/randi(9);

Error setting 'Prop1' property of 'MyClass' class:
Value must be integer.

When you assign a value to the property, MATLAB^® calls mustBeInteger with the value being assigned to the property. mustBeInteger issues an error when the value resulting from the division of these particular random integers does not result in an integer.

function r = mbInteger(A,idx)
    arguments
        A (1,:) {mustBeNumeric}
        idx (1,1) {mustBeInteger}
    end
    r = A(idx).^2;
end

Calling this function with a noninteger value results in an error being thrown by mustBeInteger. The result of dividing two random integers can result in an integer or a number with a fractional part.

idx = randi(9)/randi(9);
A = rand(1,10);
r = mbInteger(A,idx);

Error using mbInteger
Invalid input argument at position 2. Value must be integer.