Project 2 - Measuring the distance of an object using ultrasonic sensor and also smoothen the sensor data using moving average filter

#include <LiquidCrystal.h> 

LiquidCrystal lcd(12 ,11 ,5 ,4 ,3 ,2); //Define LCD Module Pins (RS,RN,D4,D5,D6,D7)
int window[10] = {0}; // Creating a integer array of 10 element.
int signalPin = 7; // connected signal pin of sensor to pin No.7 of Ardunio
long duration; // Time
long cm; // Centimeters
long inch; // Inches
void setup()
{
  Serial.begin(9600);// Initialize serial communication:
  lcd.begin(16, 2); // Initialize LCD 
}      

void loop()
{
  pinMode(signalPin, OUTPUT); // Enble pin 7 as output
  digitalWrite(signalPin, LOW); // clearing previous data
  delayMicroseconds(2); // Micro seconds delay
  digitalWrite(signalPin, HIGH); // Triggered by a HIGH pulse
  delayMicroseconds(10); // Micro seconds delay
  digitalWrite(signalPin, LOW); // Again low
  
  // The same pin is used to read the signal from the PING))):

  pinMode(signalPin,INPUT); // Enble pin 7 as input
  duration = pulseIn(signalPin,HIGH); //a HIGH pulse duration is the time (in microseconds
  cm = duration * 0.0346/2; // conversion
  inch = duration * 0.01348/2; // conversion
  lcd.setCursor(0, 0); // Setting cursor of LCD
  lcd.print(" >>Distance<<"); // Printing this message
  lcd.setCursor(0, 1); // Again setting cursor
  lcd.print(cm); // Printing converted value i.e. 'Time into Centimeters'
  lcd.print(" cm  ");
  lcd.print(inch);// Printing converted value i.e. 'Time into Inhes'
  lcd.print(" inch");
  
  // Now smoothen the sensor data 
  int current_samp = 0;
  current_samp = (duration); // duration = current_samp
  delayMicroseconds(300); // taking delay
  pushVal(current_samp);// calling function 
  Serial.println(takeAvg()); // calling function
}

void pushVal(int val)
{
  int i = 0; 
  for(i = 1;i < 10; i++)// This for loop run for 10 time 
  {
    window[i-1] = window[i]; // here setting window previous value as window new value  
  }
  window[10 - 1] = val; // finally giving to val 
}

int takeAvg() // this funtion is just taking simple avg of 10  element 
{
  int i = 0;
  long sum = 0;
  for(i = 0; i < 10; i++) // This for loop is adding 10 element 
  {
    sum += window[i]; //in each cycle sum value is incressing 
  }
  return (sum / 10); // dividing sum with number of element i.e. '10'. 
}