What is wrong with the following code:

$($ Explain your choice in calculation sheet$)$

$/*$Turns on an LED on for one second, then off for one second, repeatedly. This example code is in the public domain.$*/$

int led $=13$;

void setup$()\{$

pinMode$($led$,$ INPUT$)$;

$\}$

void loop$()\{$

digitalWrite$($led$,$ HIGH$)$;

delay$(1000)$;

digitalWrite$($led$,$ LOW$)$;

delay$(1000)$;

$\}$