title: PL\SQL statement ignored error
body: <p>I am beginner to PL\SQL and while practicing a small code, I am getting errors as below</p>
  
  <pre><code>Error(7,1): PL/SQL: Statement ignored
  Error(7,13): PLS-00302: component 'PUT_LINES' must be declared
  Error(10,1): PL/SQL: Statement ignored
  Error(10,50): PLS-00201: identifier 'LEGTH' must be declared
  </code></pre>
  
  <p>And this is the code I am using for practice </p>
  
  <pre><code>create or replace procedure show_variable_length as 
      my_char char(50) := 'Hello';
      my_varchar  varchar(25) := 'World';
      my_varchar2 varchar2(25) := 'World';
      my_null_test varchar2(25);
  
  begin 
  dbms_output.put_lines (my_char || ' ' || my_varchar);
  dbms_output.put_line (my_char || ' ' || my_varchar2);
  dbms_output.put_line('Length of my_char = ' || length(my_char));
  dbms_output.put_line('Lenght of my_varchar= ' || legth(my_varchar));
  dbms_output.put_line('Length of my_varchar2 = ' || length(my_varchar2));
  my_char := ' ';
  my_varchar := ' ';
  my_varchar2 := ' ';
  dbms_output.put_line ('Length of my char = ' || length(my_char));
  end;
  </code></pre>
  
  <p>Please help. </p>