using matlab whats wrong with my else statement its not executing when a number that's rolled isn't found in the array the else statement is suppose to execute whats wrong with it

for k = 1:roll

numbroll = ceil(310*rand);

arrayrand(k) = numbroll;

if find(arrayrand == numbroll) % find function is used in case of numeric vectors

disp("matches"+numbroll)

k=k-1;

else

starttrainingdata = T(numbroll, 1:7);

Tnew = [T;starttrainingdata];

p=p+1;

% k=k+1 <-- You don't need to do that in for loop

end