how to convert this MATLAB code into MATLAB function to be used in Simulink MATLAB function block?

clc;%Clear command window disp('Diffie Hellman Key Exchange'); disp('-----------------------------------------'); clear close all;%Clear variables in workspace and close figure

%Input value of g and p, and ensure that g and p is prime

prime = 0; while prime == 0 g = input('Enter a value for g: '); p = input('Enter a Value for p: '); pg = isprime(g); pp = isprime(p); if pg == 0 disp('g is not prime'); end if pp == 0 disp('p is not prime'); end prime = pg & pp; end

disp('---Value For X---'); xa = randi([1 p-1]);%Calculate value of Xa xb = randi([1 p-1]);%Calculate value of Xb

disp(['Xa is: ' num2str(xa)]);%Convert xa to string and display it disp(['Xb is: ' num2str(xb)]);%Convert xb to string and display it

disp('---Value For Y---'); %Calculate value of Ya and Yb ya = power(g,xa); ya = mod(ya,p); yb = power(g,xb); yb = mod(yb,p);

disp(['Ya is : ' num2str(ya)]);%Convert ya to string and display it disp(['Yb is : ' num2str(yb)]);%Convert yb to string and display it

disp('---The Shared Key---'); %Calculate shared key ha = power(yb,xa); ha = mod(ha,p); hb = power(ya,xb); hb = mod(hb,p);

disp(['Shared Key A: ' num2str(ha)]);%Convert ha to string and display it disp(['Shared Key B: ' num2str(hb)]);%Convert bb to string and display it