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Break statement and Continue in  Matlab

1.- Break

2.- Continue 

3.- Video Summary


1.- The break Statement

The break statement lets you exit early from a for or while loop. In nested
loops, break exits from the innermost loop only. It is part of the flow control in programming.



Example 1:

% Let's say that you have an array that you want to explore
y = [-2 -4 0 -4 3 7];

% You're gonna test each element for a special condition
for i = 1 : length(y)

   % Test for a greater-than-zero value
   if y(i) > 0
      % terminate loop execution
      break
   end

   % If it does not meet your condition, you can follow with your code
   z = y(i) + 6;
   disp(z)
  
end


The result is that the operation affects only the first four elements of the array; the fifth element makes the for-loop end.


Matlab shows:

result from a break operation in Matlab



Example 2:

% This could be anything previous to your break
x = 10;

% This loop should go on forever
while 1

   % Let's say that you want to validate an input from the user   
   n = input('Enter number of loops: ');
  
   % If the input is inappropriate
   if n <= 0
      % terminate the loop execution
      break
   end
  
   % If the answer is ok
   for i = 1 : n
      % follow your code, do whatever you need with your input
      x = x + 10
   end

end


The code goes on until the input is 0 or less. This is the result:

break from a while-loop


2.- The continue Statement

The continue statement temporarily interrupts the execution of a program loop, skipping any remaining statements in the body of the loop for the current pass. It continues within the loop for as long as the stated for or while condition remains true.


Example 3:

% Let's assume that you are verifying a set of values
for i = 1 : 7

  % You can do something to disregard a few elements
  if (i == 2 | i == 5)
    continue
  end
  
  % Otherwise, you can operate on the remaining values
  disp(i)

end 


The code above operates only on 5 elements of the array. This is the result...

result from a continue statement in Matlab


3.- Video Summary


 From 'break statement' to home

 From 'break statement' to 'Matlab Code - Flow Control'

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