title: Difference between interpolation and concatenation in JavaScript?
body: <p>The language and library I'm using is JS and AngularJS. Am I right in assuming that "interpolation" and "concatenation" both means "combination of strings and variables"?</p>
  
  <p>But "interpolation" is used when you're using the double curly brackets in AngularJS. And "concatenation" is used when you're using pure JS?</p>
  
  <p>Or is there another diference that I missed?</p>
  
  <p>EDIT:
  Is this interpolation or concatenation (I don't just put strings together but an a variable is resolved here)?</p>
  
  <pre><code>    var test1 = "Hello";
      var number = 2 + 3;
      console.log(test1 + " " + number);
  </code></pre>
  
  <p>Hmm.... I guess whenever I use AngularJS library to combine some expression, then it's interpolation, right?</p>