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SwapApproach1.java
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SwapApproach1.java
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package com.java.basic;
import java.util.Scanner;
/*
* Swap Two Numbers
* -----------------
* It is possible to swap two numbers without
* using third variable.
*
* Approach 1::
* using +, - operators
* a = 15, b = 20
*
* a = a + b // after a = 35, b = 20
* b = a - b // after a = 35, b = 15
* a = a - b // after a = 20, b = 15
*
*/
public class SwapApproach1 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter the value for a : ");
int a = scanner.nextInt();
System.out.println("Enter the value for b : ");
int b = scanner.nextInt();
System.out.println("Before swapping a & b : ");
System.out.println("a = "+a+", b = "+b);
//using +, - operators
a = a + b;
b = a - b;
a = a - b;
System.out.println("After swapping a & b : ");
System.out.println("a = "+a+", b = "+b);
scanner.close();
}
}
/*
OUTPUT
Enter the value for a : 15
Enter the value for b : 20
Before swapping a & b :
a = 15, b = 20
After swapping a & b :
a = 20, b = 15
OUTPUT
Enter the value for a : 2
Enter the value for b : 7
Before swapping a & b :
a = 15, b = 10
After swapping a & b :
a = 10, b = 15
*/