You seem to be referencing a 'pointer' in C. Pointers are a very fundamental part of C, they provide a way to make functions work with large amounts of data efficiently and they support dynamic memory allocation. Here's a simple way to use pointers in C: int x = 10; int *p = &x; In this code, `int x = 10;` declares an integer `x` and assigns it the value `10`. `int *p = &x;` declares a pointer variable `p` and assigns it the address of `x`. The '*' is used to denote that `p` is a pointer, and '&x' gets the address of `x`. You can use pointers for indirect access to variables, meaning you can access the data of a variable by their address. You can also get the value stored at the address the pointer `p` points to, using the * operator: int y = *p; Now, `y` holds the value `10`. As a crucial note, uninitialized pointers can cause significant problems (like crashing your program). Always ensure that your pointers are initialized before using them: int *p = NULL; Remember, C gives you great power with pointers but also a great responsibility. Misusing pointers can lead to tricky bugs, crashes, and security issues. So always be careful when using pointers.