create() nodes in single linked list

#include<stdio.h>
#include<stdlib.h>

struct Node
{
	int data;
	struct Node* link;	
};
struct Node* root=NULL;

void createList();
int length();
void display();

int main()
{
	int len;
	createList();
	
	len = length();
	printf("\nlength is : %d \n", len);
	
	display();
	return 0;
}
void createList()
{
	struct Node *new, *last;
	while(1)
	{
		new = (struct Node*)malloc(sizeof(struct Node));
		
		printf("\nEnter node data : ");
		scanf("%d", &new->data);
		
		if(root==NULL)
		{
			root = new;
			last = new;
		}
		else
		{
			last->link = new;
			last = new;
		}
		printf("\nDo you want to add another node(y/n) : ");
		if(getche()=='n')
		{
			last->link=NULL;
			break;
		}
	}
}

int length()
{
	int count=0;
	struct Node *node=root;
	while(node)
	{
		++count;
		node=node->link;
	}
	return count;
}

void display()
{
	if(root==NULL)
	{
		printf("List is Empty\n");
	}
	else
	{
		struct Node *node=root;
		printf("List elements :\n");
		while(node)
		{
			printf("%d \n", node->data);
			node=node->link;
		}
	}
}