So far our code states that the LaunchRequestHandler can handle requests of type LaunchRequest. But how should it handle that request?

Alexa should speak back to the user: “Welcome to Codecademy”.

We can use responseBuilder, .speak(), and .getResponse() to formulate that response:

handle(handlerInput) {
   const speakOutput = 'Welcome to Codecademy';

   return handlerInput.responseBuilder
      .speak(speakOutput)
      .getResponse();
}

When executed, this handle method will generate the following JSON response:

{
  "body": {
    "version": "1.0",
    "response": {
      "outputSpeech": {
        "type": "SSML",
        "ssml": "<speak>Welcome to Codecademy</speak>"
      },
      "shouldEndSession": false
    },
    "sessionAttributes": {},
    "userAgent": "ask-node/2.0.0 Node/v8.10.0"
  }
}

The response is sent back to Alexa, which will parse the JSON, and speak the words in the "ssml" value, which in this case is “Welcome to Codecademy”.