If understood your question correctly, you are asking about input arguments of a function, right? If so, here a couple simple examples with Inputs and without Inputs, but with outputs:
a1 = 1;
b1 = 2;
[Out1, Out2] = Simple_IN(a1, b1)
[OUT1, OUT2] = Simple_NO
function [C, D] = Simple_IN(IN1, IN2)
C = IN1+IN2;
D = IN1*IN2;
end
function [S, M] = Simple_NO()
A = 1;
B = 2;
S = A+B;
M = A*B;
end
In the above shown Simple_IN, the function requires two (user) input arguments, and the other one - Simple_NO requires no input arguments.
