Button checker

1#define buttonPin 2
2#define ledPin 13
3bool state = 0;
4bool lastRead  = 0;
5void setup() {
6 // put your setup code here, to run once:
7Serial.begin(9600);
8pinMode(2,INPUT);
9pinMode(13,OUTPUT);
10}
11void  loop() {
12 // put your main code here, to run repeatedly:
13state = digitalRead(2);
14if(state  != lastRead)
15{
16 Serial.println(state);
17digitalWrite(ledPin,state)
18 lastRead  = state;
19}
20}

1#define buttonPin 2
2#define ledPin 13
3bool state = 0;
4bool lastRead
5  = 0;
6void setup() {
7 // put your setup code here, to run once:
8Serial.begin(9600);
9pinMode(2,INPUT);
10pinMode(13,OUTPUT);
11}
12void
13  loop() {
14 // put your main code here, to run repeatedly:
15state = digitalRead(2);
16if(state
17  != lastRead)
18{
19 Serial.println(state);
20digitalWrite(ledPin,state)
21 lastRead
22  = state;
23}
24}