Here is a java program to check whether a number is palindrome or not using loop. An integer is called palindrome number, If the number remains same after reversing the sequence of it's digits. To check whether a number is palindrome number or not, we will create a copy of input number and reverse it's digits. If reversed number is same as input number then it is a palindrome number other not a palindrome number.
Algorithm to check whether a number is palindrome or not
- Take a number as input from user and store it in an integer variable(Let's call it num).
- Reverse the digits of num, and store it in another integer variable(Let's call it reverse).
- Compare num and reverse.
- If both are equal then num is palindrome number otherwise not a palindrome number.
Java program to check for palindrome numbers
package com.tcc.java.programs;
import java.util.*;
public class PalindromeNumberCheck {
public static void main(String args[]) {
int num, temp, reverse = 0, rightDigit;
Scanner in = new Scanner(System.in);
System.out.println("Enter a number");
num = in.nextInt();
temp = num;
/*reverse num and store it in reverse */
while(temp != 0){
rightDigit = temp % 10;
reverse = reverse*10 + rightDigit;
temp = temp/10;
}
if(reverse == num)
System.out.print(num + " is Palindrome number");
} else {
System.out.print(num + " is not a Palindrome number");
}
}
}
Output
Enter a number 1234321 1234321 is Palindrome number
Enter a number 72537625 72537625 is not a Palindrome number
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