arduino digital input pins

1void setup() {
2  pinMode(13, OUTPUT);    // sets the digital pin 13 as output
3}
4
5void loop() {
6  digitalWrite(13, HIGH); // sets the digital pin 13 on
7  delay(1000);            // waits for a second
8  digitalWrite(13, LOW);  // sets the digital pin 13 off
9  delay(1000);            // waits for a second
10}

1int ledPin = 13;  // LED connected to digital pin 13
2int inPin = 7;    // pushbutton connected to digital pin 7
3int val = 0;      // variable to store the read value
4
5void setup() {
6  pinMode(ledPin, OUTPUT);  // sets the digital pin 13 as output
7  pinMode(inPin, INPUT);    // sets the digital pin 7 as input
8}
9
10void loop() {
11  val = digitalRead(inPin);   // read the input pin
12  digitalWrite(ledPin, val);  // sets the LED to the button's value
13}