title: how to do code listing in Latex without line numbers (when using lstlisting environment)
body: <p>I have been writing a project report and have added some pseudo codes using the following command : lstlisting in Latex as shown bellow.</p>
  
  <pre><code>         \begin{lstlisting}[language=c++]
  
               # On leave focus of email field
  
             IF email is blank
           Error message: "Please enter an email address"
  
             ELSE IF email field value is not a valid email address
          Error message: "Wrong email please try again"}  
  
           # On leave focus of password
  
            IF password is not sufficiently strong
         Error message: "Password strength is not good" 
  
           \end{lstlisting}
  </code></pre>
  
  <p>The above works just fine but in the code block thy are some line numbers appearing and I would like to get ride of those. Any hints on how to remove them?
  I also know the following:</p>
  
  <pre><code>     \section*{New section}
  </code></pre>
  
  <p>Would give a section title without number. But in the case of code listing it doesn't work and produce an error instead.</p>