How to use the break command in nested loops?

Hi, I have a problem using the break command in the following code. When I use the break I exit the loop j, but I want to restart the loop i after the condition. Any idea how can I do in this case? Thanks inm advance.
for i = 1:length(initial_solution.position) - 1
itabu = i;
for j = i + 1:length(initial_solution.position)
jtabu = j;
t = CHECK_MOVE(itabu, jtabu, TL);
if (t == 1) % 0 or 1 / True or False / Tabu or not Tabu
break
end
neighbor.position = SWAP(initial_solution.position, itabu, jtabu);
% Evaluate Objective Function
neighbor = EVALUATE_OF(neighbor);
% Update best neighbor
if neighbor.OF >= best_neighbor.OF
best_neighbor = neighbor;
end
end
end

1 Comment

i think you need another outter while loop to repat the whole thing. And a flag to tell it to stop when all the i and js were done.

Sign in to comment.

Answers (1)

David Hill
David Hill on 17 Feb 2022
Edited: David Hill on 17 Feb 2022
while 1
flag=0;
for i = 1:length(initial_solution.position) - 1
itabu = i;
for j = i + 1:length(initial_solution.position)
jtabu = j;
t = CHECK_MOVE(itabu, jtabu, TL);
if (t == 1) % 0 or 1 / True or False / Tabu or not Tabu
flag=1;
break
end
neighbor.position = SWAP(initial_solution.position, itabu, jtabu);
% Evaluate Objective Function
neighbor = EVALUATE_OF(neighbor);
% Update best neighbor
if neighbor.OF >= best_neighbor.OF
best_neighbor = neighbor;
end
end
if flag
break;
end
end
if ~flag
break;
end
end

1 Comment

What? No failsafe to prevent an infinite loop? That's not very robust.

Sign in to comment.

Categories

Find more on Loops and Conditional Statements in Help Center and File Exchange

Products

Release

R2019a

Asked:

Yro
on 17 Feb 2022

Commented:

on 17 Feb 2022

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!