int trigger=12;
int echo=11;
int time;
int wait=1000;
void setup()
{
  pinMode(trigger,OUTPUT);
  pinMode(echo,INPUT);
  Serial.begin(9600);


}
void loop()
{
  digitalWrite(trigger,LOW);
  delayMicroseconds(10);
  digitalWrite(trigger,HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger,LOW);
  time=pulseIn(echo,HIGH);
  delay(wait);
  Serial.println("distance in cm");
Serial.println(time/58);// conversion constants
Serial.println("distance in inches"); // conversion constant
Serial.println(time/148);

}