Lesson Four: More Variables

1. You are able to add a variable and assign its value all in the same line.
2. Enter this code just above the document.write(event1;) code:
   

   var event2 = "250 Million Years Ago the Dinosaurs Appeared";

   
   
   
3. Now substitute the event2 variable for the event1 variable in the document.write()
   parenthesis.
4. Your code will look like this:

   var event1;
   event1 = "488 Million Years Ago the Mollusks Appeared";
   var event2 = "250 Million Years Ago the Dinosaurs Appeared";
   document.write(event2);

   
   
   
5. Test your program. The line that previously read: 488 Million Years Ago the Mollusks Appeared now reads:
   250 Million Years Ago the Dinosaurs Appeared.
6. As you instructed the browser is now using the event2 variable: Sample
7. Add this variable code: var event3 = "65 Million Years Ago - Age of the Mammals";. Make the necessary changes to display the new event: Sample

Lesson Five: The if else Conditional Statement