example_backwards_compat.ino

struct MyPrintable : Printable {
  const char *p;
  MyPrintable(const char *p) : p(p) {}
  size_t printTo(Print &P) const {int i; for (i=0; p[i]; i++) P.write(p[i]); return i;}
};

void setup() {
  #define FSH F("Flash string")
  String S("String");
  char arr[] = "char array";
  char c = 'c';
  unsigned char uc = 42;
  int           i  = 42;
  unsigned int  ui = 0x42;
  long          L  = 042;
  unsigned long uL = 0b00101010;
  double        d  = 42.0;
  MyPrintable P("Printable");
  
  Serial.begin(9600);
  Serial.println(FSH);      // FlashStringHelper
  Serial.println(S);        // String
  Serial.println(S+S);      // StringSumHelper
  Serial.println(arr);      // const char *
  Serial.println(c);        // char
  Serial.println(uc     );  // unsigned char }
  Serial.println(i,  DEC);  // int           }
  Serial.println(ui, HEX);  // unsigned int  } numbers
  Serial.println(L,  OCT);  // long          }
  Serial.println(uL, BIN);  // unsigned long }
  Serial.println(d);        // double
  Serial.println(P);        // Printable
}

void loop() { }

example_println_inlining.ino

void setup() {
  Serial.begin(9600);
  Serial.print(3);
  Serial.println(" shall be the number thou shalt count,");
  Serial.print("and the number of the counting shall be ");
  Serial.println(3);
}

void loop() { }

example_println_inlining_2.ino

void setup() {
  Serial.begin(9600);
  Serial.println("1");
  Serial.println("2");
  Serial.println("3");
  Serial.println("4");
  Serial.println("5");
  Serial.println("6");
  Serial.println("7");
  Serial.println("8");
  Serial.println("9");
  Serial.println("10");
}

void loop() { }