%% Calculations ...

sqrt(144)
144^0.5
ans^2

% split a long calculation into two lines, with ...
some_number = 1 + 1 + 1/2 + 1/6 + 1/24 + ...
    1/120 + 1/720 + 1/5040

%% Make a plot
x = linspace(0, 2*pi, 100);
y1 = sin(x);
y2 = cos(x);
plot(x,y1,x,y2);

% what is the 12 th element? print to command window
a = 12;
x(a)
y1(a)
y2(a)

% print more compactly - note these need to be grouped into an array with
% the square brackets
disp( [x(a),y1(a),y2(a)] );

%% Make a plot in a new window
figure(2)
plot(y1,y2);