What is the proper way to check for existence of variable in an EJS template (using ExpressJS)?

Question

On the EJS github page, there is one and only one simple example: https://github.com/visionmedia/ejs

Example

<% if (user) { %>
    
&         


        

Answer 1

<% if (locals.user) { %>

 // Your logic goes here 

<% } %>