Swap two values

Swap two Values with third Variable

This code demonstrates swapping two integer values, x and y. It uses a Scanner object to prompt the user to input the values for x and y. The values are then stored in the respective variables. The code then outputs the values of x and y before swapping, then swaps the values by storing x in a temporary variable temp, then assigning y to x and temp to y. Finally, the code outputs the values of x and y after swapping.

import java.util.Scanner;

class SwapValues {
	public static void main(String[] args) {
		Scanner reader = new Scanner(System.in);
		int x, y, temp;

		System.out.print("Enter a value for x: ");
		x = reader.nextInt();
		System.out.print("Enter a value for y: ");
		y = reader.nextInt();
		reader.close();

		System.out.println("Before swapping:\nX: " + x + "\nY: " + y);  
		
		// swapping numbers
		temp = x;
		x = y;
		y = temp;
	
		System.out.print("After swapping:\nX: " + x + "\nY: " + y);
	}
}

Output

Enter a value for x: 10
Enter a value for y: 20
Before swapping:
X: 10
Y: 20
After swapping:
X: 20
Y: 10

Swap two Values without third Variable

This is a Java program that swaps the values of two variables, x and y. The program uses a Scanner object reader to read the values of x and y from the user’s input.

First, the program prints out a message asking the user to enter a value for x, and then reads the user’s input using reader.nextInt(). It then prints out another message asking the user to enter a value for y, and reads the user’s input for y in the same manner.

Next, the program prints out a message showing the values of x and y before swapping them. The actual swapping of values is done in the next few lines:

x = x + y;   
y = x - y;   
x = x - y; 

Here, the values of x and y are swapped using arithmetic operations without using a temporary variable.

Finally, the program prints out a message showing the values of x and y after the swap.

import java.util.Scanner;

class SwapValues {
	public static void main(String[] args) {
		Scanner reader = new Scanner(System.in);
		int x, y;

		System.out.print("Enter a value for x: ");
		x = reader.nextInt();
		System.out.print("Enter a value for y: ");
		y = reader.nextInt();
		reader.close();

		System.out.println("Before swapping:\nX: " + x + "\nY: " + y);  
		
		// swapping numbers
		x = x + y;   
		y = x - y;   
		x = x - y; 
	
		System.out.print("After swapping:\nX: " + x + "\nY: " + y);
	}
}

Output

Enter a value for x: 4
Enter a value for y: 8
Before swapping:
X: 4
Y: 8
After swapping:
X: 8
Y: 4