When typedef is used in C, will it create a new type or only a type name?

Question

#include <stdio.h>
#include <string.h>

typedef struct Books {
     char title[50];
     char author[50];
     char subject[100];
     int book_id;
} Book;

int main( ) {

  Book book;

  strcpy( book.title, "C Programming");
  strcpy( book.author, "Nuha Ali"); 
  strcpy( book.subject, "C Programming Tutorial");
  book.book_id = 6495407;

  printf( "Book title : %s\n", book.title);
  printf( "Book author : %s\n", book.author);
  printf( "Book subject : %s\n", book.subject);
  printf( "Book book_id : %d\n", book.book_id);

  return 0;
}

Here in this example, Book is a new Data type or its just an alternate name to structure?

or in other words if the code is :typedef unsigned char newDType; newDType is a new data type or alternate name to unsigned char?

Answer 1

From the typedef specifier msdn page (click to know more)

A typedef declaration introduces a name that, within its scope, becomes a synonym for the type given by the type-declaration portion of the declaration.

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So, as quoted the new name is just an alternative name(synonym) for the original type. Generally, typedef declarations are used to make declarations more uniform and compact.