Calloc is a function in the C programming language used for dynamic memory allocation. It stands for "contiguous allocation" and is designed to allocate memory for an array of elements, initializing all bytes to zero. This is particularly useful when you want to ensure that the allocated memory does not contain any garbage values. When using Calloc, you specify the number of elements and the size of each element. The function returns a pointer to the allocated memory block. If the allocation fails, it returns a null pointer, allowing programmers to handle memory allocation errors effectively.