The Magnetic Hall Sensor

First tries without help

My mistake: used printing and reading Sensor value Code from class and connected the wires to adruino into the wrong places
got noise and weird number readings
but funny that it somehow worked with seeing differences in the numbers when putting the magnet closer to the sensor

Next I followed the instructions from Magnetic Hall sensor, thats put up on this MediaWiki

int ledPin = 13; // choose the pin for the LED
int inputPin = 3; // Connect sensor to input pin 3
int val = 0; // variable for reading the pin status

void setup() {

 pinMode(ledPin, OUTPUT);      // declare LED as output
 pinMode(inputPin, INPUT);     // declare push button as input

}

void loop(){

 val = digitalRead(inputPin);  // read input value
 if (val == HIGH) {            // check if the input is HIGH
   digitalWrite(ledPin, LOW);  // turn LED OFF
 } else {
   digitalWrite(ledPin, HIGH); // turn LED ON
 }

}

Code was written correctly
but nothing happend with the sensor (I hope I did not break it, while using the wrong code from before)
noticed that there is no need for numbers to show up, the LED on the Sensor should have loght on and off.
did not work