What is pointer arithmetic in C?

What is pointer arithmetic in C?

Pointer arithmetic allows you to perform operations on pointers, like addition and subtraction, to navigate through arrays.

Can you give me an example of how it works?

Sure! If you have an array int arr[5] = {10, 20, 30, 40, 50};, then arr + 1 points to the second element, which is 20.

What happens if I subtract two pointers?

Subtracting two pointers gives you the number of elements between them. For example, arr + 4 - (arr + 1) results in 3.

Are there any risks with pointer arithmetic?

Yes, if you go out of bounds of the array, it can lead to undefined behavior, so always ensure you're within valid limits.