What are Pointers?

#include <iostream>
using namespace std;

int main() {
    int number = 42;
    int* ptr = &number;  // Pointer to number

    cout << "Value: " << number << endl;
    cout << "Address: " << ptr << endl;
    cout << "Value via pointer: " << *ptr << endl;

    // Modify through pointer
    *ptr = 100;
    cout << "New value: " << number << endl;

    return 0;
}