#define trig 9
#define echo 8
float ultra,distance;
void setup() {
  // put your setup code here, to run once:
  pinMode(trig , OUTPUT);
  pinMode(echo, INPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(trig, HIGH);
delayMicroseconds(100);
digitalWrite(trig, LOW);
ultra=pulseIn(echo,HIGH);
distance=(ultra*0.034210101)/2;
Serial.print("Sensor Value:");
Serial.println(ultra);
delay(1000);
Serial.print("Distance:");
Serial.print(distance);
Serial.println("cm");
delay(1000);
}