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How to stop a script if conditions are met.

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Cory
Cory on 2 Feb 2012
Commented: Jingyang Xie on 6 Jan 2021 at 19:50
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.

  1 Comment

Jingyang Xie
Jingyang Xie on 6 Jan 2021 at 19:50
Hi Cory, have you solved this problem? I think I encountered the same problem...

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Accepted Answer

Walter Roberson
Walter Roberson on 2 Feb 2012
Edited: MathWorks Support Team on 9 Nov 2018
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

  2 Comments

Hao Cheng
Hao Cheng on 11 Feb 2019
"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?

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More Answers (1)

Hamid Ramezani
Hamid Ramezani on 30 Sep 2019
you may use "error" function instead of return

  3 Comments

Walter Roberson
Walter Roberson on 30 Sep 2019
However, "without displaying an error message" is part of the requirement here.
Adam K
Adam K on 10 Dec 2020
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
Rik on 10 Dec 2020
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.

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