length() problem

Projects Programming
1

Hi, everyone. I am begginer and I have a problem in my code:
It is a code that, when typing something on the serial monitor, it writes the number of characters in the variable.
When I type, it always shows an extra value in length ().
Example: when typing and sending "1234567", it shows length () = 8 and not 7.
Would anyone know why? Thanks for the answer!

String d;


void setup() {
  
  Serial.begin(115200);

}

void loop() {

  if (Serial.available() > 0) {
    d = "";
    while (Serial.available() > 0) {
      //FAZ A LEITURA DA SERIAL E ARMAZENA NA VARIÁVEL LOCAL (CHAR)
      char ch = Serial.read();
      //COLOCA O RESULTADO NUMA VARIÁVEL GLOBAL (STRING)
      d += ch;
      //Serial.print(ch);
    }
    Serial.println("Length:");
    Serial.println(d.length());
  }
}

teste_string.ino (454 Bytes)

2

What is the line ending setting for the serial monitor?

3

new-line

Changing for None end-of-line, it works :slight_smile:

Whats the difference?

Thank you!

4

The difference is a newline character.

5

Got it.

Thank you so much!

6

It is highly recommended using String.reserve() to prevent the memory fragmentation issue

7

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