String inputString = "Hello, World!\r"; // Input string with a newline character
String modifiedString = ""; // String to store the modified result

void setup() {
  Serial.begin(9600);
  
  // Remove the last character (newline) from the input string
  if (inputString.endsWith("\r")) {
    modifiedString = inputString.substring(0, inputString.length() - 1);
  } else {
    modifiedString = inputString;
  }

  // Print the modified string
  Serial.print("Original String: ");
  Serial.print(inputString);
  Serial.print("\t Text length:");
  Serial.println(inputString.length());
  Serial.print("Modified String: ");
  Serial.print(modifiedString);
  Serial.print("\t Text length:");
  Serial.println(modifiedString.length());
}

void loop() {
  // Your main loop code here
}