Keep prompting user instead of hitting run each time.

I would like this code to run in a loop that displays the cost of the package, then loops back to the beginning to prompt the user again to enter a weight (as opposed to me having to run the code each time I want the prompt). I'm sure it's really simple, I've tried putting in a return statement in the code and tried a while loop but I don't know.

weight=0;
weight=input('Input a weight');
if weight<=2
    cost=15;
    disp(cost);
elseif weight<= 70
    cost=(15+((weight-2)*5));
    disp(cost);
elseif weight <= 100
    cost= (30+((weight-2)*5));
    disp(cost);
else 
    disp('No Weight over 100');
end

Answer 1

[Rik]

You can wrap your code in a while loop, but that will force the user to hard-break out of your code (ctrl-C on Windows). A nicer solution is to provide the user with the option of exiting.

while true
weight=input('Input a weight (enter negative to exit)');
if weight<0
    break
end
if weight<=2
    cost=15;
    disp(cost);
elseif weight<= 70
    cost=(15+((weight-2)*5));
    disp(cost);
elseif weight <= 100
    cost= (30+((weight-2)*5));
    disp(cost);
else 
    disp('No Weight over 100');
end
end

Answer 2

[Walter Roberson]

Put

while true

At the top, and put

end

At the bottom.

Next question is how you are going to get out of the loop instead of having to enter values for the rest of the life of the computer.