int a =1;
int b =2;
int c =3;
int d =4;
int e =5;
int f =6;
int g =7;
int h =8;
int i =9;
int j =10;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

void loop() {
  Serial.print("a+=2 , = ");
  Serial.println(a+=2);
  Serial.print("b-=2 , = ");
  Serial.println(b-=2);
  Serial.print("c*=2 , = ");
  Serial.println(c*=2);
  Serial.print("d/=2 , = ");
  Serial.println(d/=2);
  Serial.print("e%=2 , = ");
  Serial.println(e%=2);
  Serial.print("f>>=2 , = ");
  Serial.println(f>>=2);
  Serial.print("g<<=2 , = ");
  Serial.println(g<<=2);
  Serial.print("h&=2 , = ");
  Serial.println(h&=2);
  Serial.print("i^=2 , = ");
  Serial.println(i^=2);
  Serial.print("j|=2 , = ");
  Serial.println(j|=2);
  delay(1000);
}