Write a program to reverse all the digits of a given integer.

Write a program to reverse all the digits of a given integer.

import java.util.Scanner; 

class assignment1{ 

public static void main(String[] args) { 

Scanner sc = new Scanner(System.in); 

System.out.println("Enter the number : "); 

int n = sc.nextInt(); 

reverseNum(n); 

sc.close(); 

} 

public static void reverseNum(int num) { 

int n = num; 

int rev = 0; 

while (n > 0) { 

int rem = n % 10; 

rev = rev * 10 + rem; 

n /= 10; 

} 

System.out.println("Reverse of " + num + " is " + rev); 

} 

}

OUTPUT:

Enter the number :

1234

Reverse of 1234 is 4321