C++ Palindrome Number Program

In this tutorial, you will learn how to write a C++ Program to read a number from user, and check if this number is a Palindrome or not.

C++ Palindrome Number

A number is a Palindrome, if this numeric value and its reversed value are same.

Program

In the following program, we read a number into n, and check if this number n is a Palindrome or not.

main.cpp

#include <iostream>
using namespace std;

int main() {
    int n, reversed = 0;
    cout << "Enter a number : ";
    cin >> n;
    
    //reverse n and store in reversed
    int remainder;
    int n_temp = n;
    while(n_temp != 0) {
        remainder = n_temp % 10;
        reversed = reversed * 10 + remainder;
        n_temp /= 10;
    }
    
    cout << "Given Number    : " << n << endl;
    cout << "Reversed Number : " << reversed << endl;
    
    //check if n equals reversed
    if (n == reversed) {
        cout << "The number is a Palindrome." << endl;
    } else {
        cout << "The number is not a Palindrome." << endl;
    }
}

Output

Enter a number : 123454321
Given Number    : 123454321
Reversed Number : 123454321
The number is a Palindrome.
Program ended with exit code: 0

Enter a number : 123456789
Given Number    : 123456789
Reversed Number : 987654321
The number is not a Palindrome.
Program ended with exit code: 0

Conclusion

In this C++ Tutorial, we learned how to check if given number is a Palindrome or not.