Codecademy Learn JAVA tutorial walkthrough 2 Data Types I: int

This Codecademy Java tutorial talks about a data type called int, short for integer, any negative or positive whole numbers and also zero. If you want to go deeper : any value between -2,147,483,648 and 2,147,483,648

In this exercise just type any whole number in .println() that is not a decimal number. And don't use any quotes this time. Quotes are for a different data type called strings aka texts in English. 

System.out.println(15);