//Declare variables for pin
const int trig_pin =5;
const int echo_pin =4;
long time; 
float distance; 

void setup() {
  // put your setup code here, to run once:
pinMode(trig_pin, OUTPUT);
pinMode(echo_pin, INPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
 Serial.print("\n");

digitalWrite(trig_pin, LOW); //reset option for trigger pin
delayMicroseconds(5);
digitalWrite(trig_pin, HIGH); //set trigger pin to send signal
delayMicroseconds(10);
digitalWrite(trig_pin, LOW); //set trigger pin to stop signal

time = pulseIn(echo_pin, HIGH); //to store the data generated by pulseIn function 

//Serial.print("Time Duration:    ");
//Serial.print(time);
//Serial.print(" micro s ");

//distance calculation

distance =(0.0343/2)*time ;//in cm
Serial.print("Distance: ");
Serial.print(distance);
Serial.print("  cm");
}