What does this mean?

Question

int &y = x;

Answer 1

It declares and initializes a reference (alias) called `y` for `x`. In other words, `y` holds the same value as `x` and altering `y` affects `x`, as well.

#include <iostream>

int main() {
int x = 10;
int &y = x;
++y;
std::cout << x; // 11
}

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https://en.cppreference.com/w/cpp/language/reference
https://en.cppreference.com/w/cpp/language/reference_initialization

Answer 2

Thanq..