What does 28526 mean?

Using Arduino Programming Questions
1

28526 keeps poping up in my serial monitor

#include <Servo.h>
#include <Stepper.h>

const int trigPin = 9;
const int echoPin = 10;
const int SW_pin = 2; // digital pin connected to switch output
const int X_pin = A0; // analog pin connected to X output
const int Y_pin = A1; // analog pin connected to Y output
const int L_Wheel = 4;
const int R_Wheel = 7;
int printing;

float duration, distance;

void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(SW_pin, INPUT);
  pinMode(R_Wheel, OUTPUT);
  pinMode(L_Wheel, OUTPUT);
  digitalWrite(SW_pin, HIGH);
  Serial.begin(9600);
}

void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  // Path Finding
  if (distance >= 20) {
    digitalWrite(R_Wheel, HIGH);
    digitalWrite(L_Wheel, HIGH);
    int direction = 'Forward';
  }
  else if (distance <= 20) {
    digitalWrite(R_Wheel, LOW);
    digitalWrite(L_Wheel, LOW);
  }
  duration = pulseIn(echoPin, HIGH);
  distance = (duration*.0343)/2;
  if (printing == 'on') {
  Serial.print("Distance: ");
  Serial.println(distance);
  Serial.print("Switch:  ");
  Serial.print(digitalRead(SW_pin));
  Serial.print("  ");
  Serial.print("X-axis: ");
  Serial.print(analogRead(X_pin));
  Serial.print("  ");
  Serial.print("Y-axis: ");
  Serial.print("  ");
  Serial.println(analogRead(Y_pin));
  }
  else {
    Serial.println('direction');
  }
  delay(100);
}

Only ussing sensor and motor for output on analog pin 4

2

Where in the monitor?
That is what does it say either side of it, so we can see what in that bunch of print statements,is the one causing the problem.

That is very wrong, why is the name in single quotes?

3

This is hexadecimal 6F6E and corresponds to the ASCI codes for "o" and "n", i.e. on. The comparison of text in an integer variable (printing == 'on') is somewhat "unusual".

4

Fix that first. printing is an int, I have no idea what the compiler makes of it if you give it 'on', probably rubbish.

And this one too.

Single ticks (quotes, ') for a single character, double quotes (") for text strings.

PS
If you set the warning level to all in file/preferences, you will get slapped with warnings about this.