Updating value with conditional for loop

I am struggling with being able to come up with the right sequencing of codes for creating a loop that updates values that are conditional upon the user/trial. This is what I have so far. I want the balance to display as formatted text (nested loop)and then that same "balance" needs to be stored for another ongoing loop. Ultimately, do I need this balance loop here or in my trial loop that subsumes this?

 
Balance=0;
for k=1:length(ntrials)
    if pchoice == 1
        if card_prob == 1||2|
        Balance=(Balance+lossamt)
        elseif (card_prob == 3)||(card_prob ==4)||card_prob ==5|
        Balance=(Balance+gainamt)
    if pchoice == 2
            Balance= (Balance+0)
            break;
    end
end

% The above loop is for the DrawFormattedText below, however balance is continuously updating  29 times(loop) 
% so it is also being used on every trial screen.
Screen('TextSize',win, 40);

if value_diff == 1
          card_prob = randsrc(1,1,[1,2;0.2,0.8])% when key is pressed
          if card_prob == 1 
               DrawFormattedText(win, 'Sorry, you did not win','center', 'center', [0 0 0]);
               WaitSecs(2)
              % DrawFormattedText(win, balance,'center', 'center', [0 0 0]);
          elseif card_prob == 2 
              DrawFormattedText(win, 'You Won','center', 'center', [0 0 0]);
               WaitSecs(2)
              DrawFormattedText(win, balance,'center', 'center', [0 0 0]);
          end
end

Screen('Flip', win)

[Voss]

You've got some syntax errors due to what look like extra "|" characters:

if card_prob == 1||2|
%                   ^ here
Balance=(Balance+lossamt)
elseif (card_prob == 3)||(card_prob ==4)||card_prob ==5|
%                                                      ^ here

[Jade T]

Ok, I didnt know that would be a problem, thanks for pointing this out!

Answer 1

[Sulaymon Eshkabilov]

There are a couple of errs in your code. Here is the corrected part of it.

Balance=0;
for k=1:length(ntrials)
    if pchoice == 1
        if card_prob == 1||2|
        Balance=(Balance+lossamt)
        elseif (card_prob == 3)||(card_prob ==4)||card_prob ==5|
        Balance=(Balance+gainamt)
        end
    else %pchoice == 2
            Balance= (Balance+0)
            break;
    end
end

...

[Jade T]

ok, I didnt end the first conditional statement and was redundant with p==2. Thanks for helping!