Palindrome number

This program checks whether a given number is a palindrome or not. Here’s a step-by-step explanation:

1. The program takes an input number from the user and stores it in the x variable.
2. It then creates a temp variable to store the original value of x because x will be modified later in the program.
3. The program enters a while loop to reverse the digits of the x variable and store the result in the rev variable.a. The loop continues until x becomes 0.b. In each iteration, the program extracts the last digit of x using the modulus operator (%) and stores it in the r variable.c. The program then updates the rev variable by adding the r multiplied by 10 to its current value.d. Finally, the program divides x by 10 to remove the last digit.
4. After the loop ends, the program checks if the value of temp is equal to rev.a. If they are equal, the program prints that the input number is a palindrome.b. If they are not equal, the program prints that the input number is not a palindrome.
5. The program returns 0, indicating a successful execution.

Check Palindrome number

#include <iostream>
using namespace std;

int main(){
    int x, temp, r, rev = 0;
    cout << "Enter number to check palindrome or not" << endl;
    cin >> x;
    temp = x;

    while (x != 0) {
        r = x % 10;
        rev = rev * 10 + r;
        x = x / 10;
    }

    if (temp == rev) {
        cout << temp << " is palindrome number" << endl;
    } else {
        cout << temp << " is not palindrome number" << endl;
    }

    return 0;
}

Output

Enter number to check palindrome or not: 262
262 is palindrome number

Enter number to check palindrome or not: 13
13 is not palindrome number

Check Palindrome number or string

This C++ program checks if a given string or number is a palindrome or not. A palindrome is a string or number that reads the same backward as forward.

The program takes an input string from the user and stores it in the variable str. Then, it calculates the length of the string and stores it in the length variable.

Next, it uses a for loop to iterate through the string from the end to the start, and concatenates each character to the reverse variable.

Finally, it checks if the str is equal to the reverse, and if they are equal, it prints the message “str is a palindrome”. Otherwise, it prints the message “str isn’t a palindrome”.

#include <iostream>
using namespace std;

int main(){
    string str, reverse = "";

    cout << "Enter a string or number to check palindrome number: ";
    cin >> str;

    int length = str.length();

    for (int i = length - 1; i >= 0; i--) {
        reverse = reverse + str.at(i);
    }

    if (str == reverse) {
        cout << str << " is a palindrome." << endl;
    } else {
         cout << str << "isn't a palindrome." << endl;
    }

    return 0;
}

Output

wow is a palindrome.