Peyush - use what you have above and just do nothing for the second condition. Write a comment to make it clear that this is intentional.
if condition1
% do operation 1
elseif condition2
% intentionally left blank
else
% do operation 3
end
If this code is within a loop and you want to skip all remaining operations that may follow the above, then just add a continue statement to the elseif block which will skip to the next iteration.
