​x
 
<!DOCTYPE html>
<html>
<body>
​
<p id="demo"></p>
​
<script>
var x = 5; // Initialize x
var y;   // Declare y
​
elem = document.getElementById("demo"); // Find an element 
elem.innerHTML = x + " " + y;       // Display x and y
​
y = 7;   // Assign 7 to y
​
</script>
​
</body>
</html> 
​