This allows you to enter a non-executable note within your JavaScript code. It’s there merely as a reference. A note is separated from executable code by (//). Here’s how the Statement above would look with comments:

var x, y, z; // Declare your variables

x = 25; // Assign the value 55 to x

y = 35; // Assign the value 35 to y

z = 55; // Assign the value 55 to z