just some ideas around variables and functions

JavaApplication1

package javaapplication1;

public class JavaApplication1 {

    public static void main(String[] args) {
        Integer sodasToday = 3,
                sodasYesterday = 5,
                totalSodas = sodasToday + sodasYesterday;
        
        System.out.println("i drank "+ totalSodas +" sodas"); // this puts it on the screen
        
        Integer cal = countCalories(totalSodas);
        
        System.out.println("i had "+cal+" calories"); // this puts it on the screen
        
    }
    
    static Integer countCalories(Integer sodas) {
        return sodas * 150;
    }
    
} // end class