"We can also have null statements by just including a ; or let the switch statement fall through by omitting any statements (see e.g. below).

The default case is optional and catches any other cases."

i found these lines about the switch case statement in a site.... i couldn't understand what is meant by null statement here......

the link to the page is

can somebody help me please......

A null statement is just a semicolon. It's a statement that does nothing. For example:

#include <stdio.h>

int main ( void )
  printf ( "Blah\n" ); /* Statement */

  ; /* Null statement */

  return 0;