Break in MATLAB

In MATLAB, the break statement is used within loops to terminate their execution prematurely.

Here's an example where we want to find the first negative number in a vector:

vector = [1 4 -3 5 8 -2 6];
for i=1:length(vector)
   if vector(i) < 0
       disp(['First negative number found at index ', num2str(i)]);
       break;
   end
end

In this example, the for loop is used to iterate over all the elements of the vector. Within the loop, we use an if statement to check if the current element is negative. If it is, we use the disp function to print the index of that element, and then we use break to exit the loop prematurely.

Here's another example of how to use break with a while loop. In this example, we want to continuously prompt the user for input until they enter a valid number:

while true
   num = input('Please enter a number: ');
   if isnumeric(num)
       break;
   else
       disp('Invalid input!');
   end
end

In this example, we use a while loop that runs indefinitely (i.e., true). Within the loop, we prompt the user to enter a number using the input function. We then check if the input is a numeric value using the isnumeric function. If it is, we use break to exit the loop. If not, we print an error message using disp and the loop continues to prompt the user for input.