Ultrasound Sensor with buzzer Arduino in Tamil

This is tutorial to help you understand ultrasonic and buzzer and go deeper into learning Arduino, follow these steps and give me feedback please.

I’m making it to help my cousin in his school project.

// Define pins for ultrasonic and buzzer
int const trigPin = 10;
int const echoPin = 9;
int const buzzPin = 2;

void setup()
	pinMode(trigPin, OUTPUT); // trig pin will have pulses output
	pinMode(echoPin, INPUT); // echo pin should be input to get pulse width
	pinMode(buzzPin, OUTPUT); // buzz pin is output to control buzzering

void loop()
	// Duration will be the input pulse width and distance will be the distance to the obstacle in centimeters
	int duration, distance;
	// Output pulse with 1ms width on trigPin
	digitalWrite(trigPin, HIGH); 
	digitalWrite(trigPin, LOW);
	// Measure the pulse input in echo pin
	duration = pulseIn(echoPin, HIGH);
	// Distance is half the duration devided by 29.1 (from datasheet)
	distance = (duration/2) / 29.1;
	// if distance less than 0.5 meter and more than 0 (0 or less means over range) 
    if (distance <= 50 && distance >= 0) {
    	// Buzz
    	digitalWrite(buzzPin, HIGH);
    } else {
    	// Don't buzz
    	digitalWrite(buzzPin, LOW);
    // Waiting 60 ms won't hurt any one

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