sum+

import static java.lang.Integer.sum;
import java.util.Scanner;

public class Week2 {

    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        int sum = 0;
        int read;

        System.out.println("First number: ");
        read = Integer.parseInt(reader.nextLine());
        sum = read;                                  //sum=read

        System.out.println("Second number: ");
        read = Integer.parseInt(reader.nextLine());
        sum += read;                                  //sum(second)=sum(first)+read

        System.out.println("Third number: ");
        read = Integer.parseInt(reader.nextLine());
        sum += read;                                 //sum(third)=(sum(first)+sum(second))+ read
                                                     //sum(third)=sum

        System.out.println("Sum: " + sum);

    }

}