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# Learn ES6 (ECMAScript 2015)

![](https://d2eip9sf3oo6c2.cloudfront.net/series/square_covers/000/000/049/full/EGH_LearnES6_Final.png?1496436434)

This course takes a look at some of the new features that JavaScript has available with ES6 (ECMAScript 2015). It is a "montage" from several instructors.

Each lesson's code is in its corresponding lesson folder. Plunks are drawn from the lesson's branch.
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Plunker</title>
</head>
<body>
	<script src="script.js"></script>
</body>
</html>
function varFunc(){
  var previous = 0;
  var current = 1;
  var i;
  var temp;
  
  for(i = 0; i < 10; i+=1){
    temp = previous;
    previous = current;
    current = temp + current;
  }
  console.log(current) || displayInPreview(current);
}

function letFunc(){
  let previous = 0;
  let current = 1;
  
  for(let i = 0; i < 10; i+=1){
    let temp = previous;
    previous = current;
    current = temp + current;
  }
  
  console.log(current) || displayInPreview(current);
}

varFunc();
letFunc();



// display in plunker preview
function displayInPreview(string) {
  var newDiv = document.createElement("div"); 
  var newContent = document.createTextNode(string); 
  newDiv.appendChild(newContent);
  document.body.appendChild(newDiv)
}