how do i give the user the option to stop making an input? while loops program.

I am supposed to create a program where i will continuously have the user input a grade for exam scores until they decide they want to stop. I've made this program so far but the way i set it up so it can stop (grade == 0) still counts the 0 in the end as the total amount of grades entered but i dont want it to do that. is there a better way giving the user an option to stop?

x = [];
loop = 1;
count = 0;
while (loop)
  grade = input('Enter a grade: ');
  count = count + 1
  x = [x;grade]; 
  if grade == 0 
    break
    end
endwhile
fprintf('%g grades were entered.\n',count);

Answer 1

[Tommy]

Check the value of grade immediately after the user inputs it, and only update count and x if the loop should continue:

x = [];
loop = 1;
count = 0;
while (loop)
  grade = input('Enter a grade: ');
  if grade == 0 
    break
  end
  count = count + 1
  x = [x;grade]; 
end
fprintf('%g grades were entered.\n',count);

What if someone scored a 0?