Create Singly Linked List

C/Singly Linked List

@@ -0,0 +1,75 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+struct Node {
+    int data;
+    struct Node* next;
+};
+
+struct Node* createNode(int data) {
+    struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
+    newNode->data = data;
+    newNode->next = NULL;
+    return newNode;
+}
+
+void insertAtBeginning(struct Node** head, int data) {
+    struct Node* newNode = createNode(data);
+    newNode->next = *head;
+    *head = newNode;
+}
+
+void insertAtEnd(struct Node** head, int data) {
+    struct Node* newNode = createNode(data);
+    if (*head == NULL) {
+        *head = newNode;
+    } else {
+        struct Node* temp = *head;
+        while (temp->next != NULL) {
+            temp = temp->next;
+        }
+        temp->next = newNode;
+    }
+}
+
+void deleteNode(struct Node** head, int key) {
+    struct Node* temp = *head, *prev = NULL;
+    if (temp != NULL && temp->data == key) {
+        *head = temp->next;
+        free(temp);
+        return;
+    }
+    while (temp != NULL && temp->data != key) {
+        prev = temp;
+        temp = temp->next;
+    }
+    if (temp == NULL) return;
+    prev->next = temp->next;
+    free(temp);
+}
+
+void displayList(struct Node* head) {
+    while (head != NULL) {
+        printf("%d -> ", head->data);
+        head = head->next;
+    }
+    printf("NULL\n");
+}
+
+int main() {
+    struct Node* head = NULL;
+
+    insertAtBeginning(&head, 10);
+    insertAtBeginning(&head, 20);
+    insertAtEnd(&head, 30);
+    insertAtEnd(&head, 40);
+
+    printf("Linked List: ");
+    displayList(head);
+
+    deleteNode(&head, 20);
+    printf("After deletion: ");
+    displayList(head);
+
+    return 0;
+}