express template engine code example

Example 1: how to set view engine in express

app.set("view engine", "ejs");
app.set("views", path.join(__dirname, "views"));

Example 2: what is template engine in express

A template engine enables you to use static template files in your application. 
At runtime, the template engine replaces variables in a template file with actual values, and transforms the template into an HTML file sent to the client.