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/*
String charAt() and setCharAt()
Examples of how to get and set characters of a String
created 27 Jul 2010
modified 2 Apr 2012
by Tom Igoe
This example code is in the public domain.
https://www.arduino.cc/en/Tutorial/BuiltInExamples/StringCharacters
*/
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("\n\nString charAt() and setCharAt():");
}
void loop() {
// make a String to report a sensor reading:
String reportString = "SensorReading: 456";
Serial.println(reportString);
// the reading's most significant digit is at position 15 in the reportString:
char mostSignificantDigit = reportString.charAt(15);
String message = "Most significant digit of the sensor reading is: ";
Serial.println(message + mostSignificantDigit);
// add blank space:
Serial.println();
// you can also set the character of a String. Change the : to a = character
reportString.setCharAt(13, '=');
Serial.println(reportString);
// do nothing while true:
while (true);
}
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