how can i make a function file that will request the user if he will like to start the code execution? i would like to use inputs

clc
clear all
%Assign variables to constants
V1=.3; V2=.3;
E1=200*10^9; E2=200*10^9;
d1=38; d2=70;
L=50;
F=450;
Z1=.025; Z2=.25; Z3=2.5;
%First Calculation for principal stress
b=sqrt((2*F)*((1-V1^2)/E1)+((1-V2^2)/E2)/((pi*L)*((1/d1)+(1/d2))));
Pmax=(2*F)/(pi*b*L);
%Second Calculation for principal stress
a1=Z3/b;
a2=sqrt(1+(Z3^2/b^2));
%Third calculation for principal stress
O1=(-2*V2*Pmax)*(a2-a1)
O2=(-Pmax)*(2-(1/(1+(Z3^2/b^2)))*(a2-(2*a1)))
O3=(-Pmax)/a2

Answer 1

[Walter Roberson]

while true
  ...
  if wants_to_quit()
     break;
  end
end

function should_quit = wants_to_quit
  user_answer = = input('Do you want to continue? [Y] or N', 's');
  should_quit = ismember(lower(user_answer), {'n', 'no'});