C++ Program to check Whether a Number is Palindrome or Not

In the previous article, we have discussed C++ Program to print ASCII Value of All Alphabets. In this article, we will see C++ Program to check Whether a Number is Palindrome or Not.

C++ Program to check Whether a Number is Palindrome or Not

Write a C++ program to check whether a number is palindrome or not.

Before jumping to a C++ program to check whether a number is palindrome or not, here is a brief overview of palindrome numbers.

A number is palindrome, if number remains same after reversing it’s digits.

For Example:
1234321 is palindrome number, but 123456 is not a palindrome number.

To check whether N is palindrome number or not, first of all we have to reverse the sequence of digits of N and then compare it with original N. If both are equal then N is palindrome number.

Algorithm to check a number is palindrome or not

Take a number as input from user and store it in an integer variable(Let’s call it inputNumber).
Reverse the digits of inputNumber, and store it in another integer variable(Let’s call it reverseNumber).
Compare inputNumber and reverseNumber.
If both are equal then inputNumber is palindrome number otherwise not a palindrome number.

C++ program to check palindrome number

#include <iostream>
 
using namespace std;
  
int main(){
    int inputNumber, reverseNumber = 0, rightDigit, temp;
    cout << "Enter a number\n";
    cin >> inputNumber;
     
    temp = inputNumber;
    // reverse inputNumber and store it in reverseNumber
    while(temp != 0){
        rightDigit = temp % 10;
        reverseNumber = (reverseNumber * 10) + rightDigit;
        temp = temp/10;
    }
    // If input Number and reverse Number are same 
 // then palindrome othrwise not
    if(reverseNumber == inputNumber){
        cout << inputNumber << " is Palindrome Number";
    } else {
        cout << inputNumber << " is not a Palindrome Number";
    }
      
    return 0;
}

Output

Enter a number
1234321
1234321 is Palindrome Number

Enter a number
123456
123456 is not a Palindrome Number

In above program, we first take a number as input from user using cin and store it in variable original. Copy the value of original variable to another variable copy. Then using a while loop, we reverse the sequence of digits of a number. Finally, we compare reverse and original number. If both are equal then input number is palindrome otherwise not a palindrome number.

If you are a newbie to the programming languages and want to explore all Example C++ Program for acquiring the best coding skills. Have a look at our C++ Programs Tutorial.

C++ Program to check Whether a Number is Palindrome or Not

C++ program to check palindrome number

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