Java program to reverse number
Reverse a number is good interview question.
import java.util.Scanner;
public class ReverseNumber {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
System.out.println("Enter Number");
int num=sc.nextInt();
System.out.println("Reverse Number="+doReverseNumber(num));
}
private static int doReverseNumber(int num){
int reverseNum=0;
while (num>0) {
reverseNum=reverseNum*10+(num%10);
num/=10;
}
return reverseNum;
}
}
Output:
Enter Number
123
Reverse Number=321
+++++++++++++++++++
Enter Number
120
Reverse Number=21
++++++++++++++++++++
Enter Number
054
Reverse Number=45
