New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  firstname:'amritha',
  lastname:'amri',
  fullname:Ember.computed(firstname,lastname,
   function() {
    console.log(firstname+lastname);
  }),
  actions:{
  changevalue(){
  this.set('firstname',hello);
	}
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
firstname:{{firstname}}
<button {{action "changevalue"}}>click me</button>
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}