code is running but nothing pops up in my workspace?

in my command window it says

lab4

Enter a score (-1 to stop):

ctA = 0;  %fill this with the quantity of A grades
ctB = 0;  %fill this with the quantity of B grades
ctC = 0;  %fill this with the quantity of C grades
ctD = 0;  %fill this with the quantity of D grades
ctF = 0;  %fill this with the quantity of F grades

d = input('Enter a score (-1 to stop):  ');
scores = []; %empty array where values are stored

while d ~= -1
    scores = [scores d]
    d = input('Enter a score (-1 to stop):  ');
end 
     for i =1:length(scores)        % length of value i
         if (scores(i) >= 90)       % input if value is less than or equal to 90
             ctA = ctA + 1         % how many As
             scores = [scores, i];  % store the # of As in to score
          
           
         elseif (scores(i) >=80)    %input if value is less than or equal to 80
               ctB = ctB +1         % how many Bs
               scores= [scores i];  %store the # of Bs in to score
          
           
         elseif (scores(i) >=70)     %input if value is less than or equal to 70
               ctC = ctC + 1         % how many Cs
               scores= [scores i];   %store the # of Cs in to score
          
         elseif (scores(i) >=60)       %input if value is less than or equal to 60 
               ctD = ctD + 1          
               scores= [scores i];
         
           
       elseif (scores(i) <60)
               ctF = ctF + 1
               scores= [scores i];
          
         end
   
     end
     %displaying grades
     disp("# of As: " + ctA);
     disp("# of Bs: " + ctB);
     disp("# of Cs: " + ctC);
     disp("# of Ds: " + ctD);
     disp("# of Fs: " + ctF);

[James Tursa]

What did you enter at the prompt?

[Aman Vyas]

Hi,

You can try relaunching or matlab again or try re-running as this script runs perfectly fine for me.

I am attaching the screenshot that i obtained on running your script. Take a look at the output I obtained:

purposes only. Not for sale.

>> ml_a
Enter a score (-1 to stop):  45

scores =

    45

Enter a score (-1 to stop):  22

scores =

    45    22

Enter a score (-1 to stop):  33

scores =

    45    22    33

Enter a score (-1 to stop):  -1

ctF =

     1


ctF =

     2


ctF =

     3

# of As: 0
# of Bs: 0
# of Cs: 0
# of Ds: 0
# of Fs: 3
ml_a
>> 

Hope it helps !