When I try to run the following code I am unable to return to command prompt in matlab

I am new to matlab.I wrote the following code.The problem is that the loop is not terminating.Please help me find out the problem

actualvalue = randn(2000,10);
reward = zeros(2000,10,1000);
for i=1:2000
    for j=1:10
        for k=1:1000
            mean = actualvalue(i,j);
            reward(i,j,k) = normrnd(mean,1);
        end;
    end;
end;