Added Code to insert node from the end.

insert_end.c

@@ -0,0 +1,95 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <malloc.h>
+
+struct node
+{
+  int data;
+  struct node *next;
+};
+
+struct node *start = NULL;
+struct node *create_ll(struct node *);
+struct node *display(struct node *);
+struct node *insert_end(struct node *);
+
+int main()
+{
+  int choice;
+  do
+  {
+    printf("\nEnter 1 to create list, \n2 to insert data from the end, \n3 to display \nand 4 to end!\n:-");
+    scanf("%d",&choice);
+    switch(choice)
+    {
+     case 1:start= create_list(start);
+            printf("Linked List Created: ");
+            break;
+
+     case 2:start= insert_end(start);
+            break;
+
+     case 3:start= display(start)
+            break;
+    }
+  }while(choice !=4)
+  return 0;
+}
+
+struct node *create_ll(struct node *start)
+{
+   struct node *new_node, *ptr;
+   int num;
+   printf("\nEnter -1 to end\nEnter the Data:");
+   scanf("%d",&num);
+  while(num!=-1)
+  {
+    new_node=(struct node*)malloc(sizeof(struct node));
+    new_node->data=num;
+    if(start=NULL)
+    {
+      new_node->next=NULL;
+      start=new_node;
+    }
+    else
+    {
+      ptr=start;
+      while(ptr->next!=NULL)
+      {ptr=ptr->next;}
+      ptr->next = new_node;
+      new_node->next=NULL;
+
+    }
+    printf("\nEnter the data: ");
+    scanf("%d",&num);
+  }
+  return start;
+}
+
+struct node *display(struct node *start)
+{
+  struct node *ptr;
+  ptr=start;
+  while(ptr!=NULL)
+  {
+    printf("\t %d", ptr->data);
+    ptr=ptr->next;
+  }
+  return start;
+}
+
+struct node *insert_end(struct node *start)
+{
+   struct node *new_node, *ptr;
+   int num;
+   printf("\nEnter the Data to be inserted from the end:");
+   scanf("%d",&num);
+   new_node=(struct node *)malloc(sizeof(struct node));
+   new_node->data=num;
+   new_node->next=NULL;
+  ptr=start;
+  while(prt->next !=NULL)
+  {prt=ptr->next;}
+  ptr->next = new_node;
+  return start;
+}