Question

How to swap two numbers without using third variable in Java

Answer 1

package javaapplication1;

public class JavaApplication1 {
 
    public static void main(String[] args) {
        
        int a = 5, b = 13;
     
        a = a + b;
        b = a - b;
        a = a - b; 
        
        System.out.println("a = " + a);
        System.out.println("b = " + b);
    }
}
   
/*
run:
  
a = 13
b = 5
   
*/

 

70+ SQL courses for beginners and professionals

Answer 2

package javaapplication1;

public class JavaApplication1 {
 
    public static void main(String[] args) {
        
        int a = 5, b = 13;
      
        a = a + b - (b = a);
        
        System.out.println("a = " + a);
        System.out.println("b = " + b);
    }
}
   
/*
run:
  
a = 13
b = 5
   
*/

 

70+ SQL courses for beginners and professionals

Answer 3

package javaapplication1;

public class JavaApplication1 {
 
    public static void main(String[] args) {
        
        int a = 5, b = 13;
      
        a = a ^ b;
        b = a ^ b;
        a = b ^ a;
        
        System.out.println("a = " + a);
        System.out.println("b = " + b);
    }
}
   
/*
run:
  
a = 13
b = 5
   
*/

 

70+ SQL courses for beginners and professionals

Answer 4

package javaapplication1;

public class JavaApplication1 {
 
    public static void main(String[] args) {
        
        int a = 5, b = 13;
      
        a = b - ~a - 1;
        b = a + ~b + 1;
        a = a + ~b + 1;
        
        System.out.println("a = " + a);
        System.out.println("b = " + b);
    }
}
   
/*
run:
  
a = 13
b = 5
   
*/

 

70+ SQL courses for beginners and professionals