Program to Find Whether a Number is a Palindrome or Not [C, C++, Python & Java]

In this tutorial, we will learn how to write a program in C, C++, Python, and Kava that checks whether the entered number is a palindrome or not.

Here are the prerequisites to writing a palindrome program:

• while loop
• if...else statement

What is a Palindrome Number?

A palindrome number is a unique number whose reverse is equal to it. In other words, a palindrome is a number that remains the same even if it is reversed.

For example, 11, 111, 121, 131… are palindrome numbers.

Palindrome Program in C

#include <stdio.h>
int main()
{
    int num, temp, remainder, reserved=0;
    printf("Enter a number: ");
    scanf("%d", &num);
    temp = num;
    while (num!=0)
    {
        remainder = num%10;
        reserved = reserved*10+remainder;
        num = num/10;
    }
    if (temp == reserved)
        printf("%d is a palindrome.", temp);
    else
        printf("%d is not a palindrome.", temp);
    return 0;
}

Output:

Enter a number: 454
454 is a palindrome.

Palindrome Program in C++

#include<iostream>
using namespace std;
int main()
{
   int num, temp, remainder, reserved=0;
   cout<<"Enter a number: ";
   cin>>num;
   temp = num;
   while(num!=0)
   { 
      remainder = num%10;
      reserved = reserved*10+remainder;
      num = num/10;
   }
   if(temp == reserved)
      cout<<temp<<" is a palindrome";
   else
      cout<<temp<<" is not a palindrome";
   return 0;
}

Output:

Enter a number: 656
656 is a palindrome

Palindrome Program in Python

num =int(input("Enter a Number: "))
temp = num
reserved =0
while num!=0:
    remainder = num%10;
    reserved = reserved*10+remainder;
    num = num//10;
    
if temp == reserved:
    print(temp, "is a palindrome")
else:
    print(temp, "is not a palindrome")

Output:

Enter a Number: 1111
1111 is a palindrome

Palindrome Program in Java

import java.util.*;
public class Main
{
   public static void main(String[] args)
   { 
      int num, temp, remainder, reserved=0;
      Scanner sc = new Scanner(System.in);
      System.out.println("Enter a number: ");
      num = sc.nextInt();
      temp = num;
      while(num!=0)
      { 
         remainder = num%10;
         reserved = reserved*10+remainder;
         num = num/10;
      }
   if(temp == reserved)
      System.out.println(+temp+ " is a palindrome");
   else
      System.out.println(+temp+ " is not a palindrome");
  
   }
}

Output:

Enter a number: 
676
676 is a palindrome

Conclusion

We hope the above programs in C, C++, Python, and Java have helped you understand the concept of a palindrome number. Once you understand the logic of separating the digits of a number, you can easily implement a palindrome program.

Try it on your own!

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