#include <Arduino.h>

void setup() {
  Serial.begin(115200); 
  int number = 5;
  int *ptr = &number;  // Pointer to number

  Serial.println("Before modification:");
  Serial.println(number);

  *ptr = 10;  // Modify value using pointer

  Serial.println("After modification:");
  Serial.println(number);
}

void loop() {
  // Nothing here
}