How to compare previous results in iteration?

I have a program with for loop having 1to 500. I need to compare the output of previous and current iteration, if the outputs are matching the program has to stop. Otherwise the loop has to continue till the match is achieved.

For example:

for i=1 to 500

[Some mathematical calcultion]

output= 109;

end

Expected output:

iteration has to stop when output [i] = output [i-1]

Answer 1

[Torsten]

You should never check whether two variables are equal. Always check whether they are approximately equal:

difference = 1.0;
output_old = 0.0;
tolerance = 1e-6;
while difference > tolerance
  [Some mathematical calculations]
  output = ...;
  difference = abs(output_old-output);
  output_old = output;
end

[ASHA PON]

Hi. Actually, my calculation output value will always be an integer. So, how should I write the code.

[Torsten]

MATLAB does not have "integer" as data type. And I don't know how "output" is calculated in your code. So you should keep the code above as is. It will also work for integer values of "output".

[ASHA PON]

Thank you for the reply.