| /* | |
| Adding Strings together | |
| Examples of how to add Strings together | |
| You can also add several different data types to String, as shown here: | |
| 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/StringAdditionOperator | |
| */ | |
| // declare three Strings: | |
| String stringOne, stringTwo, stringThree; | |
| void setup() { | |
| // initialize serial and wait for port to open: | |
| Serial.begin(9600); | |
| while (!Serial) { | |
| ; // wait for serial port to connect. Needed for native USB port only | |
| } | |
| stringOne = String("You added "); | |
| stringTwo = String("this string"); | |
| stringThree = String(); | |
| // send an intro: | |
| Serial.println("\n\nAdding Strings together (concatenation):"); | |
| Serial.println(); | |
| } | |
| void loop() { | |
| // adding a constant integer to a String: | |
| stringThree = stringOne + 123; | |
| Serial.println(stringThree); // prints "You added 123" | |
| // adding a constant long integer to a String: | |
| stringThree = stringOne + 123456789; | |
| Serial.println(stringThree); // prints "You added 123456789" | |
| // adding a constant character to a String: | |
| stringThree = stringOne + 'A'; | |
| Serial.println(stringThree); // prints "You added A" | |
| // adding a constant string to a String: | |
| stringThree = stringOne + "abc"; | |
| Serial.println(stringThree); // prints "You added abc" | |
| stringThree = stringOne + stringTwo; | |
| Serial.println(stringThree); // prints "You added this string" | |
| // adding a variable integer to a String: | |
| int sensorValue = analogRead(A0); | |
| stringOne = "Sensor value: "; | |
| stringThree = stringOne + sensorValue; | |
| Serial.println(stringThree); // prints "Sensor Value: 401" or whatever value analogRead(A0) has | |
| // adding a variable long integer to a String: | |
| stringOne = "millis() value: "; | |
| stringThree = stringOne + millis(); | |
| Serial.println(stringThree); // prints "The millis: 345345" or whatever value millis() has | |
| // do nothing while true: | |
| while (true); | |
| } | |