Java program to reverse number

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

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