using menu() function to calculate time differences

london = datetime
timeZones = {'Amsterdam', 'Tokyo', 'Canberra', 'Los Angeles', 'New York', 'Local (London)','Close'}
while button~=7 %7th button is 'close'
button == menu('Choose your timezones',timeZones)
%Amsterdam
if button ==1
ams=london+hours(1)
disp(ams)
disp('+1:00')
%Tokyo
elseif button ==2
tok=london+hours(9)
disp(tok)
disp('+9:00')
%Canberra
elseif button ==3
can= london +hours(11)
disp(can)
disp('+11:00')
%Los Angeles
elseif button==4
los = london +hours(-8)
disp(los)
disp('-8:00')
%New York
elseif button==5
new= london +hours(-5)
disp(new)
disp('-5:00')
%London(Local)
elseif button==6
disp('No time difference')
disp(london)
else
end
end

I used a while loop so the menu doesn't close after a choice.

it does work in that sense, but when i press 'close' i cannot close it and the loop becomes endless unless i force to end. Also no matter what button i press, it gives london time.

what have I done wrong here?

Answer 1

[Sreelakshmi S.B]

There's a mistake in the 5th line of you code.You're using == .You need to use =.

Also,you need to have the first assignment to 'button' before comparing it in the while condition.The code below works fine.I just made a few modifications to your code:

london = datetime;
timeZones = {'Amsterdam', 'Tokyo', 'Canberra', 'Los Angeles', 'New York', 'Local (London)','Close'};
button = menu('Choose your timezones',timeZones);

while button~=7 %7th button is 'close'
    %Amsterdam
    if button ==1
        ams=london+hours(1);
        disp(ams);
        disp('+1:00');
    %Tokyo
    elseif button ==2
        tok=london+hours(9);
        disp(tok);
        disp('+9:00');
    %Canberra
    elseif button ==3
        can= london +hours(11);
        disp(can);
        disp('+11:00');
    %Los Angeles
    elseif button==4
        los = london +hours(-8);
        disp(los);
        disp('-8:00');
    %New York
    elseif button==5
        new= london +hours(-5);
        disp(new);
        disp('-5:00');
    %London(Local)
    elseif button==6
        disp('No time difference');
        disp(london);
    else
    end
    button = menu('Choose your timezones',timeZones);
end