k = 5
disp("Display a matrix")
a1 = [1, 2, 3; 4, 5, 6]
a2 = [-1, -2, -3; -4, -5, -6]
disp(a1, a2)
disp("Display a vector")
v1 = [1, 2, 3]
v2 = [4, 5, 6]
disp(v1, v2)
disp("--------------------------------")
disp("Scalar and Vector:")
disp("k + v1: ", k + v1)
disp("k - v1: ", k - v1)
disp("k * v1: ", k * v1)
disp("v1 / k: ", v1 / k)
disp("Element by Element v1 .^ k", v1 .^ k)
disp("--------------------------------")
disp("Scalar and Matrix:")
disp("k + a1", k + a1)
disp("k - a1", k - a1)
disp("k * a1", k * a1)
disp("a1 / k", a1 / k)
disp("Element by Element a1 .^ k", a1 .^ k)
disp("--------------------------------")
disp("Vector and Vector:")
disp("v1 + v2", v1 + v2)
disp("v1 - v2", v1 - v2)
disp("v1 .* v2", v1 .* v2)
disp("v1 ./ v2", v1 ./ v2)
disp("Element by Element v1 .^ v2", v1 .^ v2)
disp("--------------------------------")
disp("Matrix and Matrix:")
disp("a1 + a2", a1 + a2)
disp("a1 - a2", a1 - a2)
disp("a1 .* a2", a1 .* a2)
disp("a1 ./ a2", a1 ./ a2)
disp("Element by Element a1 .^ a2", a1 .^ a2)
disp("--------------------------------")
disp("5x5 Matrix:")
a3 = [
    1, 2, 3, 4, 5;
    2, 3, 4, 5, 6;
    3, 4, 5, 6, 7;
    4, 5, 6, 7, 8;
    5, 6, 7, 8, 9;
   ]
disp(a3)
disp("Element at 3rd row, 5th Column:", a3(3, 5))
disp("Element at 5th row, 2nd Column:", a3(5, 2))
disp("Elements in 2nd row:", a3(2,:))
disp("Elements in 3rd column:", a3(:,3))
disp("Submatrix with rows 4-5 and columns 2-3:",a3(4:5,2:3))
disp("Submatrix with rows 2-5 and columns 2-5:",a3(2:5,2:5))
disp("Entire Matrix:", a3(:,:))
a4 = a3