How to stop a script if conditions are met.

I am using the 'if' function to detect if a user inputs a number that is not 5 digits long. What I would like is a function that stops the script if a certain condition is met without displaying an error message.

P.S. I'm very new to MATLAB.

[Jingyang Xie]

Hi Cory, have you solved this problem? I think I encountered the same problem...

Answer 1

[Walter Roberson]

To stop running a script or function and return to the invoking function or command window, use the return function. For example,

if a > b
   return
end

Any code in the current script or function that is after the return function is not run

[Hao Cheng]

"return" will terminate the current function and go back to the function that calls it. Is it possible then to stop running the entire script in GUI?

For example. A button's Callback function calls another function F. How to stop the Callback function as well if certain critieria in function F is met?

[Diaa]

This might help you. https://www.mathworks.com/help/matlab/ref/uiwait.html

Answer 2

[Hamid Ramezani]

you may use "error" function instead of return

[Walter Roberson]

However, "without displaying an error message" is part of the requirement here.

[Adam K]

I think a 'msgbox' to really alert the user what is the issue, and then the 'error' funcition to stop the code would be a workaround. This way the user is aware that the issue is not really an 'error' when they see the red error font.

msg = "You've got a number that is not 5 digits long";

f = msgbox(msg)

error(msg)

[Rik]

I wonder if it is possible to detect if the code is running in a try block. In such cases the message might be more confusing than simply throwing the error.