Here is 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.
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.
- 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;
while(temp != 0){
rightDigit = temp % 10;
reverseNumber = (reverseNumber * 10) + rightDigit;
temp = temp/10;
}
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.
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