How to print Integer alongside String Arduino?

Question

I am trying to print an integer alongside a string but it\'s not really working out and am getting confused.

int cmdSeries = 3;

Serial.println(\"Series : \" + c         


        

Answer 1

There is a huge difference between Arduino String class and regular C-string. The first one overloads addition operator, but there is almost excessive usage of dynamic memory. Mainly if you use something like:

String sth = String("blabla") + intVar + "something else" + floatVar;

Much better is just using:

Serial.print("Series : ");
Serial.println(cmdSeries);

Btw, this string literal resides in Flash and RAM memory, so if you want to force using flash only:

Serial.print(F("Series : "));

But it's for AVR based Arduinos only. This macro can save a lots of RAM, if you are using lots of literals.

EDIT: Sometimes I use this:

template <class T> inline Print & operator<<(Print & p, const T & val) {
  p.print(val);
  return p;
}

// ...

Serial << F("Text ") << intVar << F("...") << "\n";

It prints each part separately, no concatenations or so.

Answer 2

Try this

int cmdSeries = 3;
Serial.println(String("Series : ") + cmdSeries);