malloc(sizeof(struct Node))

This is a C code that allocates memory for a new node in a linked list data structure.

The malloc() function is used to dynamically allocate memory in C. sizeof(struct Node) calculates the size of the memory block required for the structure Node defined in the code. This size is then passed as a parameter to malloc(), which returns a void pointer pointing to the allocated memory block.

The code snippet can be used to create a new node in a linked list by initializing the struct fields with appropriate values. For example:

struct Node *newNode = (struct Node *) malloc(sizeof(struct Node));
newNode->data = 10;
newNode->next = NULL;

This creates a new node with data value 10 and NULL next pointer. The newNode pointer can then be used to link it with other nodes in the linked list.