ES6 - let - block scoping // source http://jsbin.com/vahifug by shreshthmohan

index.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>ES6 - let - block scoping</title>
</head>
<body>

<script id="jsbin-javascript">
const a = 6;
const b = 7;

if (a < b ) {
  let c = 8;
  console.log('c from inside the if block: ', c);
}

try {
  console.log('c from outside the if block: ')
  console.log(c);
} catch(err) {
  console.log(err);
}

console.log('See that? This is block scoping. The variable c is available only inside the block it\'s declared in');
</script>



<script id="jsbin-source-javascript" type="text/javascript">
const a = 6;
const b = 7;

if (a < b ) {
  let c = 8;
  console.log('c from inside the if block: ', c);
}

try {
  console.log('c from outside the if block: ')
  console.log(c);
} catch(err) {
  console.log(err);
}

console.log('See that? This is block scoping. The variable c is available only inside the block it\'s declared in');

</script></body>
</html>

jsbin.vahifug.js

const a = 6;
const b = 7;

if (a < b ) {
  let c = 8;
  console.log('c from inside the if block: ', c);
}

try {
  console.log('c from outside the if block: ')
  console.log(c);
} catch(err) {
  console.log(err);
}

console.log('See that? This is block scoping. The variable c is available only inside the block it\'s declared in');