/*

  Forum: https://forum.arduino.cc/t/issue-with-reading-writing-characters-in-string-array/1198946/2
  Wokwi: https://wokwi.com/projects/383743348014536705 

*/

char nmea[] = "abcdefg";
int lengthOfNmea = sizeof(nmea)/sizeof(nmea[0]);

void setup() {
  Serial.begin(4800);
  nmea[3] = 'L';   // set nmea[3] to "L"
  Serial.println(nmea);
  // Use the function strlen to get the text length
  Serial.print("strlen :\t");
  Serial.println(strlen(nmea));
  // Use the calculation sizeof(nmea)/sizeof(nmea[0]) to get the size in memory
  // allocated by char nmea[] = "abcdefg";
  // It is one char/byte more than the letters above ...
  // because the end of the char string is marked by a zero = '\0'
  // that requires an additional entry
  Serial.print("sizeof-calc :\t");
  Serial.println(lengthOfNmea);

  Serial.print("[ ");
  for (int i=0; i<lengthOfNmea;i++){
    Serial.print(nmea[i],HEX);
    Serial.print(" ");
  }
  Serial.println("  ]");

  Serial.print("[  ");
  for (int i=0; i<lengthOfNmea;i++){
    Serial.print(nmea[i]);
    Serial.print("  ");
  }
  Serial.println("]");


}

void loop() {
}