What is pointer arithmetic in C?

Can you explain what pointer arithmetic is in C?

Sure! Pointer arithmetic allows you to perform operations on pointers, such as addition and subtraction, to navigate through memory.

How does adding an integer to a pointer work?

When you add an integer to a pointer, it moves the pointer forward by that many elements of the type it points to. For example, if you have an int pointer and add 1, it moves to the next integer in memory.

What happens if I subtract two pointers?

Subtracting two pointers gives you the number of elements between them, which is useful for determining the distance in an array.

Can you give me an example of pointer arithmetic in code?

Certainly! Here's a simple example:

int arr[] = {10, 20, 30};
int *ptr = arr;
ptr += 1; // Now ptr points to arr[1], which is 20