Jerome Try/Catch

app.js

/**
 * In the following example, the code in the try block will trigger the catch block
 * without explicitly calling "throw new Error('error message')"
 * 
 * When you try to reference a variable that does not exist, Node itself will throw 
 * the error.
 */
 
try {
  console.log(varNotReal);
} catch (e) {
  console.log('Error', e);
}

Many thanks for this.
Things are clearer now.