How to print Integer alongside String Arduino?
Solution 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.
Solution 2
Try this
int cmdSeries = 3;
Serial.println(String("Series : ") + cmdSeries);
The Little Cousin
Hobbyist, I like to work on my personal Home-Automation project at home Using Arduino~Uno and C# Visual Studio and to program for fun. Front-End Web-Development & Graphic Design.
Updated on June 04, 2022Comments
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The Little Cousin almost 2 years
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 : " + cmdSeries);// That's where the problem occur
In visual basic we used to do it this way:
Dim cmdSeries As Integer Console.Writeline(""Series : {0}", cmdSeries)
So i've tried it with Serial.println but it returns this error : call of overloaded 'println(const char [14], int&)' is ambiguous
Can anyone help my out, I want to achieve this without using any libraries and in a clean way.
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The Little Cousin about 7 yearsInteresting, isn't there any other clean methods, if I have to print 20 values with text it's going to be super difficult hasn't anybody found any solution or haven't even the Arduino Devs though about it?
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KIIV about 7 yearsSometimes I'm using overloaded operator<< to do that. I just have to find the right sketch :)
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KIIV about 7 years@The_Little_Cousin Updated. It's using
Print
interface, so it can be used with many other classes. However no formatting support.