What is the purpose of the following algorithm?

boolean valid $=$ false;

int input;

while $(!$valid$)$

$\{$

System. out.print$("$Please enter a number between $1$ and $10$: $")$;

input $=$ in$.$ nextInt $()$ ;

if input && input $10$

$\{$

valid $=$ true;

$\}$

else

$\{$

System.out.println$("$Invalid input."$)$;

$\}$

$\}$

prompting until a match is found

comparing adjacent values

finding the first match

counting matches