Trouble Getting a Program to Loop

Hello, I'm currently trying to get some code to Loop But I'm having an issue. As you can see in the code below I'm asking the user if an outputted number matches what it is in the real world. Based on entries they'll get 2 potential options. First if it matches the program will end, next if it doesn't match the program will ask them if they want to enter the real number in again (Y/N) if they answer no the program will end, if they aswer yes I want it to take them back to the beginnning where they are given the option of input a number. Thanks, any help will be appreciated.

str = input('What is the correct value of the lisence plate?   ','s');
if str==noPlate
    disp('Nice, the value entered matches MatLab');
else
    m = input('The entered value does not match MatLab. Would you like to try again? (Y/N)','s');
    if m=='N'
        disp('The End')
        
    elseif m=='Y'
        str = input('What is the correct value of the lisence plate?   ','s')
        if str==noPlate
            disp('Nice, the value entered matches MatLab');
        else
            m = input('The entered value does not match MatLab. Would you like to try again? (Y/N)','s');
            if m=='N'
                disp('The End')
                
            elseif m=='Y'
                return;
            end
        end
        
    end
end

[Walter Roberson]

Please have a look at https://www.mathworks.com/matlabcentral/answers/1660490-how-can-i-rerun-my-code-if-my-given-statement-is-not-followed-by-the-user#answer_906420

Answer 1

[Sai Teja G]

Hi Thomas,

I understand that you would like to restart your program when you click 'Y' if it doesn't match the 'noplate' condition.

To accomplish this, I suggest reviewing the following code example that demonstrates how to achieve this functionality:

while true 
    str = input('What is the correct value of the lisence plate?   ','s'); 
    if str==noPlate 
        disp('Nice, the value entered matches MatLab'); 
        break; 
    else 
        m = input('The entered value does not match MatLab. Would you like to try again? (Y/N)','s'); 
        if m=='N' 
            disp('The End') 
            break; 
        elseif m=='Y' 
            disp('Starting again') 
        else 
            displ('Wrong Input, so closing program') 
            break; 
        end 
        
    end 
end 

You can adapt the above code snippet to your specific program logic and requirements.

Hope it helps!

[Walter Roberson]

What is class(noPlate) ?

If it is char then what happens in the code if the entered str is not exactly the same length as noPlate is?

[Sai Teja G]

Right now it is just a code snippet, Thomas has to adapt to it and make changes in the code accordingly.

[Walter Roberson]

I am saying that the code is very likely wrong. It should be using strcmp() or strcmpi() instead of == to compare between items that might well be char vectors -- or if you must use == then make sure that at least one of the parameters is string()

[Sai Teja G]

Yeah very well explained, thanks. Thomas can write the code accordingly.