String myString1 = "Arduino";
String myString2 = "Robot";

void setup() {
  Serial.begin(9600);
  
  char letter = myString1.charAt(2);
  Serial.print("charAt(2): ");
  Serial.println(letter);

  int result = myString1.compareTo(myString2);
  Serial.print("compareTo: ");
  Serial.println(result);

  String str1 = "Hello ";
  String str2 = "World";
  str1.concat(str2);
  Serial.print("concat: ");
  Serial.println(str1);

  bool ends = myString1.endsWith("ino");
  Serial.print("endsWith 'ino': ");
  Serial.println(ends);

  bool isEqual = myString1.equals("arduino");
  Serial.print("equals (case-sensitive): ");
  Serial.println(isEqual);

  isEqual = myString1.equalsIgnoreCase("arduino");
  Serial.print("equalsIgnoreCase: ");
  Serial.println(isEqual);

  byte buffer[10];
  myString1.getBytes(buffer, 7);
  Serial.print("getBytes: ");
  Serial.write(buffer, 7);
  Serial.println();

  int index = myString1.indexOf('d');
  Serial.print("indexOf('d'): ");
  Serial.println(index);

  index = myString1.lastIndexOf('o');
  Serial.print("lastIndexOf('o'): ");
  Serial.println(index);

  int len = myString1.length();
  Serial.print("length: ");
  Serial.println(len);

  String temp = myString1;
  temp.remove(2);
  Serial.print("remove(2): ");
  Serial.println(temp);

  temp = myString1;
  temp.remove(2, 3);
  Serial.print("remove(2, 3): ");
  Serial.println(temp);

  temp = myString1;
  temp.replace('d', 't');
  Serial.print("replace('d', 't'): ");
  Serial.println(temp);

  myString1.reserve(50);
  Serial.println("reserve(50) done");

  temp = myString1;
  temp.setCharAt(2, 'x');
  Serial.print("setCharAt(2, 'x'): ");
  Serial.println(temp);

  bool starts = myString1.startsWith("Ard");
  Serial.print("startsWith 'Ard': ");
  Serial.println(starts);

  String sub = myString1.substring(3);
  Serial.print("substring(3): ");
  Serial.println(sub);

  sub = myString1.substring(1, 4);
  Serial.print("substring(1, 4): ");
  Serial.println(sub);

  char charBuffer[10];
  myString1.toCharArray(charBuffer, 7);
  Serial.print("toCharArray: ");
  Serial.println(charBuffer);

  String floatString = "3.14";
  float floatValue = floatString.toFloat();
  Serial.print("toFloat: ");
  Serial.println(floatValue);

  String intString = "123";
  int intValue = intString.toInt();
  Serial.print("toInt: ");
  Serial.println(intValue);

  temp = myString1;
  temp.toLowerCase();
  Serial.print("toLowerCase: ");
  Serial.println(temp);

  temp = myString1;
  temp.toUpperCase();
  Serial.print("toUpperCase: ");
  Serial.println(temp);

  String spacedString = "   Arduino   ";
  spacedString.trim();
  Serial.print("trim: ");
  Serial.println(spacedString);
}

void loop() {
}