const int trigPin =5;
const int echopin = 18 ;
#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.39370
long duration;
float distanceCm;
float distancelnch;
void setup() {
Serial.begin(115200);
pinMode(trigPin, OUTPUT);
pinMode(echopin, INPUT);
}
void loop() {
 digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration =pulseIn(echopin,HIGH);
  distanceCm=duration*SOUND_SPEED/2;
  distancelnch =distanceCm* CM_TO_INCH;
  Serial.print ("Distane(Cm);");
  Serial.print(distanceCm);
  Serial.print("Disance(inch)");
  delay(1000);
}