Hello everyone! I just start using C programming as i execute a numerical method in MATlab for a heat diffusion problem. I have solve my problem but my code can be a little better. HERE is part of my code and i use comments to ask for help! for i=2:10 E(i,1)=20; T(i,1)=1; Q(i,1)=0; end for t=1:50 for i=1:11 R(i,1)=E(i,1); end for m=1:100 %this is the loop i want to exit,it counts iterations% Sum=0; for i=2:10 T(i,1)=a*E(i,1)+b*(E(i-1,1)+E(i+1,1)+T(i-1,1)+T(i+1,1)); %9 temperatures i want end %to calculate% for i=2:10 Sum=Sum+abs(T(i,1)-Q(i,1)); %this is the error i want to calculate% end if Sum<=0.001 % when this is true i want to leave the "m" loop% m=101; % here is the help that i need,i want to leave the "m" loop% else %without changing the value of m,in fact i want to know how many% for i=2:10 %iterations i need until the error is <=0% Q(i,1)=T(i,1); end end end for i=2:10 E(i)=T(i); end end i read something about "break" but i m not sure how to use it Thanks a lot for your time!