MATLAB Control Flow & Logic

Control Flow & Logic

If Else:

     if(condition)
          ...body
     elseif(condition)
          ...body
     else
          ...body  
     end 

While

    while (condition)
           ...body
           continue // skip this step
           break    // exit Loop
    end

Loop

• use continue to skip step
• use break to exit loop

    for v = start: step : end
        ...body
          continue // skip this step
          break    // exit Loop
    end

Switch Case

• MATLAB executes only one case of any switch statement: If the first case statement is true, MATLAB does not execute the other case statements.

• Variables defined within one case are not available for other cases.

• case_expression must be a scalar, a character vector, or a cell array of scalars or character vectors.

• switch_expression must be a scalar or character vector

    switch switch_expression
    
          case case_expression 
               ...body
             
          case {case_expression1, case_expression2} // Fall Through
             ...body
             
          otherwise
              warning('Unexpected plot type. No plot created.')
    end

Try Catch flow

• You cannot use multiple catch blocks within a try block, but you can nest complete try/catch blocks.

• MATLAB does not allow the use of a finally block within try/catch statements.

  try
  ...body
  
  catch ME
     switch ME.identifier
         case 'MATLAB:UndefinedFunction'
             warning('Function is undefined.  Assigning a value of NaN.');
             
         case 'MATLAB:scriptNotAFunction'
             warning(['Attempting to execute script as function. '...
                 'Running script and assigning output a value of 0.']);
  
         otherwise
             rethrow(ME)
     end
  end