What is the difference between malloc and realloc?

Can you explain the difference between malloc and realloc in C?

Sure! malloc is used to allocate a specific amount of memory, while realloc is used to resize an already allocated memory block.

How does malloc work? What does it return?

malloc allocates a block of memory of a specified size and returns a pointer to the beginning of the block. If it fails, it returns NULL.

And what about realloc? When should I use it?

You should use realloc when you need to change the size of a previously allocated memory block. It can also move the block to a new location if necessary.

Are there any risks associated with using these functions?

Yes, if you forget to free the memory allocated by malloc or realloc, it can lead to memory leaks. Always ensure to free memory when it's no longer needed.