char input;
String in = "";
const int ledPin = 13;

void setup() {
  Serial.begin(9600);
  Serial.setTimeout(10);
  pinMode(ledPin,OUTPUT);
}
void loop() {
  while (Serial.available()==0){}
  while (Serial.available() > 0){
    input = Serial.read();
    Serial.println("The value of n " + String(input));
    in.concat(input);
    if (isPalindrome(in.toInt())){
      digitalWrite(ledPin,HIGH);
      Serial.println("Is Palimdrome Led Is ON");
    }
    else{
      digitalWrite(ledPin,LOW);
      Serial.println("Is Palimdrome Led Is OFF");
    }
  }
  Serial.println("Final Input is " + in);
}
boolean isPalindrome(int n){
  int r,sum=0,temp;
  int n=454;//It is the number variable to be checked for palindrome

  temp=n;
  while(n>0){
   r=n%10;  //getting remainder
   sum=(sum*10)+r;
   n=n/10;
  }
  if(temp==sum)
   return true;
  else
   return false;
}