module main;

  function automatic [7:0] factorial;
    input [7:0] i_Num;
    begin
      if (i_Num == 1)
        factorial = 1;
      else
        factorial = i_Num * factorial(i_Num-1);
    end
  endfunction

  initial
    begin
      $display("Factorial of 1 = %d", factorial(1));
      $display("Factorial of 2 = %d", factorial(2));
      $display("Factorial of 3 = %d", factorial(3));
      $display("Factorial of 4 = %d", factorial(4));
      $display("Factorial of 5 = %d", factorial(5));
    end
endmodule