const int trigpin = 5;
const int echopin = 18:
#define SOUND SPEED 0.034 //define sound speed in cm/us
#define CM_TO_INCH 0.393701
long duration:
float distanceCm/
float distanceInch;
void setup() 
{
  Serial.begin(115200)     // Starts the serial communication
pinMode (trigPin, OUTPUT);     // Sets the trigpin as an output

pinMode (echopin, INPUT);

// Sets the echopin as an Input

void loop()(

digitalWrite(trigPin, LOW); // Clears the trigin

delayMicroseconds(2);

digitalWrite(trigPin, HIGH); // Sets the trigPin on HIGH state for 10 micro seconds

delayMicroseconds (10):

digitalWrite (trigPin, LOW);

duration= pulsein (schopin, HIGH); // Reads the echopin, returns the sound wave travel time in microseconds

distanceCm = duration SOUND SPEED/2;// Calculate the distance

distanceInch = distancem CM_TO_INCH;// Convert to inches

Serial.print ("Distance (cm): "); // Prints the distance in the Serial Monitor

Serial.println(distanceCm) >

Serial.print ("Distance (inch): ");

Serial.println(distanceInch);

delay(1000)