Question

Write a Java function to swap two integers.

Answer 1

//swap_number() method will swap two integers
public static void swap_number(int m,int n)
{
   int c; //declare third variable
   c=m; //assign first number to third variable
   m=n; //assign value of second variable to firtst variable
   n=c;//assign value of third variable to second variable
   System.out.println("After swap first number is "+m +" second number is "+n);
}

PROGRAM IMPLEMENTATION

import java.lang.*;
import java.util.Scanner;

class swap
{

//swap_number() method will swap two integers
public static void swap_number(int m,int n)
{
   int c; //declare third variable
   c=m; //assign first number to third variable
   m=n; //assign value of second variable to firtst variable
   n=c;//assign value of third variable to second variable
   System.out.println("After swap first number is "+m +" second number is "+n);
}
//driver program
public static void main(String[] args)
{
   //declare the scanner object to read data
Scanner scr= new Scanner(System.in);
   int a,b; //declare two integers
   System.out.println("Enter two numbers"); //ask user for two numbers
   a=scr.nextInt(); //read first number
   b=scr.nextInt();//read second number
   //diplsay the numbers
   System.out.println("Before swap first number is "+a +" second number is "+b);
   swap_number(a,b); //call to swap method
}
}

          

OUTPUT