What is FILE pointer in c programming language?

FILE pointer is struct data type which has been defined in standard library stdio.h. This data type points to a stream or a null value. It has been defined in stdio.h as

typedef struct{

    short          level;

    unsigned       flags;

    char           fd;

    unsigned char  hold;

    short          bsize;

    unsigned char  *buffer, *curp;

    unsigned       istemp;

    short          token;

} FILE;