What's the difference between the types - int * and int *[100] in C?

Kinda of a noob so don't kill me here.

What's the difference between the following codes?

int *p;         //As i understand, it creates a pointer to an variable of size int.
int *p[100];    //Don't really know what this is.
int (*p)[100];  // I have come to understand that this is a pointer to an array.