Find the sum of digits in MATLAB (Example: Numbers with a sum of digits equals to 6)

count_equal_to_6.m

count_equal_to_6 = 0;

for times = 1:1000
    if sumOfDigits(times) == 6
        display(times)
        count_equal_to_6 = 1 + count_equal_to_6;
    end
end

fprintf('Total: %d\n', count_equal_to_6)
      
function p = sumOfDigits(n)
    a = 0;
    stringVar = num2str(n);
    for times = 1:strlength(num2str(n))
        num = num2str(stringVar(times))-48;
        a = a + num;
    end
    p = a;
end