4basicmath java

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package javaapplication2;
import java.util.Scanner;


public class proj3 {
    public static void main(String[] args)
    {
Scanner keyboard = new Scanner(System.in);
int num1, num2, num3, sum, diff, quo, prod;
System.out.print("Enter num1:");
num1 = keyboard.nextInt();
System.out.print("Enter num2:");
num2 = keyboard.nextInt();


    sum = num1+num2;
    diff = num1-num2;
    quo = num1/num2;
    prod = num1*num2;
    System.out.println("Sum=" +sum);
    System.out.println("Difference=" +diff);
    System.out.println("Quotient=" +quo);
    System.out.println("Product=" +prod);
    }
}