C Programming Code Examples C > Recursion Code Examples Program to Find the Length of the String using Recursion Program to Find the Length of the String using Recursion This C Program uses recursive function & counts the number of nodes in a linked list. A linked list is an ordered set of data elements, each containing a link to its successor. #include <stdio.h> #include <stdlib.h> struct node { int a; struct node *next; }; void generate(struct node **); int length(struct node*); void delete(struct node **); int main() { struct node *head = NULL; int count; generate(&head); count = length(head); printf("The number of nodes are: %d\n", count); delete(&head); return 0; } void generate(struct node **head) { /* for unknown number of nodes use x = rand() % 20; */ int x = 10, j; struct node *temp; for (j = 0; j < x; j++) { temp = (struct node *)malloc(sizeof(struct node)); temp->a = j; if (*head == NULL) { *head = temp; (*head)->next = NULL; } else { temp->next = *head; *head = temp; } } } int length(struct node *head) { if (head->next == NULL) { return 1; } return (1 + length(head->next)); } void delete(struct node **head) { struct node *temp; while (*head != NULL) { temp = *head; *head = (*head)->next; free(temp); } }