4.3 Doubly link list

#include<stdio.h>
#include<stdlib.h>
int ll_size = 0;
struct Node{
    int value;
    struct Node *next;
    struct Node *prev;
};
typedef struct Node Node;
struct Node *head = NULL;

void Insertion(int pos , int ele){
    Node *temp = ( Node*) ( malloc(sizeof(Node) ) );
    if( ( pos>ll_size+1 || pos<1)  || temp == NULL){
        printf("\nYou entered wrong position or memory is not allocated");
        return;
    }
    temp->value = ele;
    if(pos == 1){
        temp->prev = NULL;
        temp->next = head;
        head = temp;
    }
    else{
        struct Node *ptr = head;
        pos-=2;
        while(pos--){
            ptr = ptr->next;
        }
        temp->prev = ptr;
        temp->next = ptr->next;
        ptr->next = temp;
    }
    ll_size++;
}
void Deletion(int pos){
    if(head == NULL || (pos>ll_size || pos<1) ){
        printf("\nlinked list is empty already or you have entered wrong position");
        return;
    }
    Node *dele;
    if(pos == 1){
        dele = head;
        head = head->next;
        head->prev = NULL;
        free(dele);
    }
    else{
        Node *ptr=head;
        pos-=2;
        while(pos--){
            ptr = ptr->next;
        }
        dele = ptr->next;
        ptr->next = ptr->next->next;
        ptr->prev = dele->prev;
        free(dele);
    }
    ll_size--;
}
void Print(){
    Node *ptr  = head;
    while(ptr != NULL){
        printf("%d ",ptr->value);
        ptr = ptr->next;
    }
}
int main()
{
    int choice,ele,pos,key;
    while(1){
        printf("\n1 for insertion\n2 for deletion\nany to key just print the link list\n");
        scanf("%d",&choice);
        if(choice == 1){
            printf("Enter the position where you want to insert the element ");
            scanf("%d",&pos);
            printf("\nEnter the element ");
            scanf("%d",&ele);
            Insertion(pos,ele);
        }
        else if (choice == 2){
            printf("\nEnter the position want to delete ");
            scanf("%d",&pos);
            Deletion(pos);
        }
        else Print();
        printf("\n1 to repeat and any key to exit ");
        scanf("%d",&key);
        if(key != 1) break;
    }
    return 0;
}