How to check if my array is square with if and else loops?

A = [1 -2 1;
    0 2 -8;
    -4 5 9]

How can I check if this array is a square array using an if-else loop?

Answer 1

[Chunru]

A = [1 -2 1;
    0 2 -8;
    -4 5 9]

A = 3×3

1 -2 1 0 2 -8 -4 5 9

if ndims(A)==2 && (size(A,1)==size(A,2))
    disp("A is Square")
end

A is Square