How to make a password edit text that only accepts the defined value and gives error when given different input.

Hi I making a 4 digit password GUI in which when i put the correct password it opens up another GUI. The problem I am facing is that I am not able to compare the password when I am pressing the "Enter" pushbutton, I tried various "*is" functions but still couldn't get the desired output.

Here's my Code

function edit1_Callback(hObject, eventdata, handles)

% hObject handle to edit1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit1 as text

% str2double(get(hObject,'String')) returns contents of edit1 as a double

% --- Executes during object creation, after setting all properties.

function edit1_CreateFcn(hObject, eventdata, handles)

% hObject handle to edit1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor','white');

end

% --- Executes on button press in key1.

function key1_Callback(hObject, eventdata, handles)

% hObject handle to key1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

old=get(handles.edit1,'string');

new=('1');

new1=strcat(old,new); % add two different strings

set(handles.edit1,'string',new1,limit_text(4));

% --- Executes on button press in key2.

function key2_Callback(hObject, eventdata, handles)

% hObject handle to key2 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

old=get(handles.edit1,'string');

new=('2');

new1=strcat(old,new); % add two different strings

set(handles.edit1,'string',new1);

% --- Executes on button press in key3.

function key3_Callback(hObject, eventdata, handles)

% hObject handle to key3 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

old=get(handles.edit1,'string');

new=('3');

new1=strcat(old,new); % add two different strings

set(handles.edit1,'string',new1);

% --- Executes on button press in key4.

function key4_Callback(hObject, eventdata, handles)

% hObject handle to key4 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

old=get(handles.edit1,'string');

new=('4');

new1=strcat(old,new); % add two different strings

set(handles.edit1,'string',new1);

% --- Executes on button press in key5.

function key5_Callback(hObject, eventdata, handles)

% hObject handle to key5 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

old=get(handles.edit1,'string');

new=('5');

new1=strcat(old,new); % add two different strings

set(handles.edit1,'string',new1);

% --- Executes on button press in key6.

function key6_Callback(hObject, eventdata, handles)

% hObject handle to key6 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

old=get(handles.edit1,'string');

new=('6');

new1=strcat(old,new); % add two different strings

set(handles.edit1,'string',new1);

% --- Executes on button press in key7.

function key7_Callback(hObject, eventdata, handles)

% hObject handle to key7 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

old=get(handles.edit1,'string');

new=('7');

new1=strcat(old,new); % add two different strings

set(handles.edit1,'string',new1);

% --- Executes on button press in key8.

function key8_Callback(hObject, eventdata, handles)

% hObject handle to key8 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

old=get(handles.edit1,'string');

new=('8');

new1=strcat(old,new); % add two different strings

set(handles.edit1,'string',new1);

% --- Executes on button press in key9.

function key9_Callback(hObject, eventdata, handles)

% hObject handle to key9 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

old=get(handles.edit1,'string');

new=('9');

new1=strcat(old,new); % add two different strings

set(handles.edit1,'string',new1);

% --- Executes on button press in keyclear.

function keyclear_Callback(hObject, eventdata, handles)

% hObject handle to keyclear (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

set(handles.edit1,'string', '');

% --- Executes on button press in key0.

function key0_Callback(hObject, eventdata, handles)

% hObject handle to key0 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

old=get(handles.edit1,'string');

new=('0');

new1=strcat(old,new); % add two different strings

set(handles.edit1,'string',new1);

% --- Executes on button press in keydel.

function keydel_Callback(hObject, eventdata, handles)

% hObject handle to keydel (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

temp = get(handles.edit1,'String');

temp(end) =[]; %make the last/end entry blank [];

set(handles.edit1, 'String', [temp]);

% --- Executes on button press in keyenter.

function keyenter_Callback(hObject, eventdata, handles)

% hObject handle to keyenter (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

x = get(handles.edit1,'String');

y = "6996";

if isempty(x)

set(handles.edit1,'String','');

elseif isreal(x) && length(x)==4 && isstring(y)

Mainhmi

else

set(handles.edit1,'String','');

end

Here's my Figure

Answer 1

[Image Analyst]

When you want to check it, do this

truePassword = 'whatever';
userEntry = handles.edit1.String;
if strcmp(truePassword, userEntry)
    % Correct password
else
    % Incorrect password
    warningMessage = sprintf('%s is not the correct password.\nTry again.', userEntry)
    uiwait(warndlg(warningMessage))
    % Clear bad entry from edit field.
    handles.edit1.String = '';
end

[Brendan Dsouza]

Thank you so much. May god bless you with plenty of hoes.