Arduino pure c programming part2 push button

/*
Toggle a on-board led if push button is pressed

*/

#include <avr/io.h>

void init_io()
{

DDRB |= 1<<PB5; //Setting the pin as output
DDRD &= ~(1<<PD2); //Setting the pin as input

}

int is_button_pressed()
{
return (PIND&(1<<PD2)) ;
}

void toggle_led()
{
PORTB ^= 1<<PB5;
}

int main()
{

init_io();

while(1){
if(is_button_pressed())
toggle_led();
}


return 0;

}