catch
catch is used in try-catch blocks and is executed when an exception or error occurs in the try block.
Syntax
catch (errorhandler)
Inputs
- errorhandler
 - Code to be executed when an error occurs in the try block.
 
Example
try
    a*2
catch
    disp('Error in try block, cannot find variable [a]');
end
      Error in try block, cannot find variable [a]