terminating a script with a quit comand

I have been told to make a script that will evaluate a string, and at the end it must ask the user if they are sure they want to quit if yes then quit if no then rerun the switch.

 this is an example of what i need it to look like for choice 7:

Please choose an option:

1. Length

2. First letter

3. Last letter

4. Reverse

5. All

6. Enter a new string

7. Quit

Choice: 7

Are you sure you would like to quit (Yes/No)? n

Please choose an option:

1. Length

2. First letter

3. Last letter

4. Reverse

5. All

6. Enter a new string

7. Quit

Choice: 7

Are you sure you would like to quit (Yes/No)? y

Quitting program

>>

my code looks like:

clear; clc; close all;

choice = input('please give a "string"(PHRASE) to be evaluated: ', 's');

%this is a function that i created that evaluates the string.

[length firstLetter lastLetter reverse all] = singletary6(choice);

%function [stringLength, firstLetter, lastLetter, reverse, all] = singletary6(str)

%if isempty(str)

% stringLength = 0;

% firstLetter = '';

% lastLetter = '';

% reverse = '';

% all = '';

%else ~isempty(str);

% stringLength = length(str);

% firstLetter = str(1);

% lastLetter = str(length(str));

% reverse = str(end:-1:1);

% all = str;

%end

%end

disp(choice)

menu = sprintf('1. length\n2. First letter\n3. Last Letter\n4. Reverse\n5. All\n6. Enter a new String\n7. Quit\n');

fprintf('1. length\n2. First letter\n3. Last Letter\n4. Reverse\n5. All\n6. Enter a new String\n7. Quit\n');

choose = input('Choose a comand from 1-7:');

while choose <= 7

     switch choose
        case 1
            length
            disp(menu)
            choose = input('Choose a comand from 1-7:');
        case 2
            firstLetter
            disp(menu)
            choose = input('Choose a comand from 1-7:');
        case 3
            lastLetter
            disp(menu)
            choose = input('Choose a comand from 1-7:');
        case 4
            reverse
            disp(menu)
            choose = input('Choose a comand from 1-7:');
        case 5
            all
            disp(menu)
            choose = input('Choose a comand from 1-7:');
        case 6
            choice = input('Enter a new String(phrase)', 's');
            [length firstLetter lastLetter reverse all] = singletary6(choice);
            fprintf('\n')
            disp(menu)
            choose = input('Choose a comand from 1-7:');
            fprintf('\n')
        case 7
            disp('Quit')
            button = sprintf('Ready to quit?\nYes\nNo\n');
          switch button 
           case 'Yes',
              disp('Exiting MATLAB');
              %Save variables to matlab.mat
              save
             case 'No',
              quit cancel;
          end
        end
      end
%i know there is a lot of stuff here but wanted to give as much as possible to help with an answer.

[SonOfAFather]

while i have continued to work this i have found that case 7 which now looks like this:

         case 7
            disp('Quit')
            terminate = input('Are you sure you want to quit(yes/no)', 's');
          switch terminate
              case 'no'
                  disp(menu)
                  choose = input('Choose a comand from 1-7:');
              case 'yes' 
                  terminate = 0;
          end

no works, but yes is greating a restatement of case 7. any ideas?

Answer 1

[Matt Fig]

Since the SWITCH is in the loop, why not just set choose to 10 if the user wants to quit? Then the loop condition will fail and the program will cease...

case 7
    disp('Quit??')
    terminate = input('Are you sure?(yes/no)', 's');
    if strcmp(terminate,'no')
       disp(menu)
       choose = input('Choose a comand from 1-7:');
    else
       choose = 10;  % Now the WHILE condition will fail.
       disp('bye-bye!')
    end
end

[SonOfAFather]

thanks matt that works