if <expression>
   % statement(s) will execute if the boolean expression is true 
   <statements>
end

a = 10;
% check the condition using if statement 
   if a < 20 
   % if condition is true then print the following 
      fprintf('a is less than 20\n' );
   end
fprintf('value of a is : %d\n', a);

a is less than 20
value of a is : 10