Lets say I have a function: 

function [ A, B, C ] = test(x, y, z)
    A=2*x;
    B=2*y;
    C=2*z;
end

When you press run, Matlab returns only the first value from the output arguments - [A] in this case. Is there a command that I can put inside my function that automatically returns all the function output arguments [A,B,C] instead of just the first argument. I know I can type in my command windows [ A, B, C ] = test(x, y, z) and get all the values, but I am lazy sometimes, and would just like to press Run and get automatically all the values. 

Some options:

Add a parameter to specify verbose output the console but set it to false by default: 

function [ A, B, C ] = test(x, y, z, verbose)

   if nargin = 3
       verbose = false;
   end;

   A=2*x;
   B=2*y;
   C=2*z;

   if verbose
       fprintf('A = %f\nB = %f\nC = %f', A, B, C);
   end;

end

or combine them into one output: 

function output = test(x, y, z)

   A=2*x;
   B=2*y;
   C=2*z;

   output = [A, B, C]; %// Or {A;B;C} if they're not going to be the same size, but then it won't display anyway

end

or if you really really want to I guess you could write a wrapper function that you call on your function and it displays all three for you that you could use generically on any function. But that hardly seems worthwhile.