void loop() {
        digitalWrite(triggerpin, HIGH);  //Setting the triggerpin high for 10us to
        // generate a wave
        delayMicroseconds(10);
        digitalWrite(triggerpin, LOW);

        //At this point the ultrasonic bursts would have been generated and the echo
        //pin would have been set to high according to the
        // ultrasonic sensor datasheet. If so then why is the below pulseIn() function
        //working.


        time = pulseIn(echopin, HIGH);

        //some more code

        }