SWAP NUMS

import java.util.Scanner;

public class asdasd{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
 int a = 10;
 int b = 20;
System.out.println("a="+a+"      b="+b);
int temp = a;
a=b;
b=temp;
System.out.println("a="+a +"      b="+b);


}
}