Insert at last singly (Hoyna)

#include<stdio.h>
#include<stdlib.h>
typedef struct node
{
    char ch;
    float a;
    struct node *next;
}node;

node *head=NULL, *list=NULL;

void insert_at_last()
{
    node *N=(node*)malloc(sizeof(node));
    scanf("%c %f",&N->ch, &N->a);
    N->next=NULL;

    if(head==NULL)
    {
        head=N;
        return;
    }
    else
    {
        node *list=head;
        while(list->next!=NULL)
        {
            list=list->next;
        }
        N->next=list->next;
        list->next=N;
    }
}

void display()
{
    node *list=head;
    while(list!=NULL)
    {
        printf("Data: %c %.2f\n", list->ch, list->a);
        list=list->next;
    }
}

int main()
{
    int i;
    for(i=0; i<3; i++)
    {
        insert_at_last();
    }
    display();
}