Does anyone know how to do this problem

MATLAB has timing functions that allow your program to monitor how much time has elapsed. These are called tic and toc. The function toc returns the amount of time since the last tic. Use a while loop to do the following for a total of 4 seconds. Every 0.3 seconds print, using fprintf, the message “The elapsed time is:” followed by the elapsed time.

[Geoff Hayes]

Ethan - see tic and toc for details. Calling tic will start a stopwatch timer, and calling toc will return the elapsed time since the stopwatch timer was started. Note that toc can refer to a specific stopwatch timer. Pay particular attention to the third example given in the toc link.

Answer 1

[David Sanchez]

tic

lim = 0.3;
N=1;
while toc<.61

      %%%%%
      a=rand;%whatever your program does here
      %%%%%

      tmp = toc;
      if tmp>lim
          fprintf('The elapsed time is %g\n', tmp)
          N=N+1;
          lim=lim*N;
      end
  end

[David Sanchez]

obviously, you chane .61 by 4 to cover up your case

...
while toc < 4
...