public class whatIsYourType
{
static final double PI = 3.1415; //store value of PI until fourth decimal
    public static void main(String [] args)
    {
        int number = 3;//variable number store integer of 3
        char aSingleLetter = 'A';//store character of ‘A’. ‘A’ is not equal ‘a’
        String someText = "This is some text."//store some text
        boolean logic= true;//store logic true.
    }
}