| /* | |
| String length() and trim() | |
| Examples of how to use length() and trim() in 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/StringLengthTrim | |
| */ | |
| 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 | |
| } | |
| // send an intro: | |
| Serial.println("\n\nString length() and trim():"); | |
| Serial.println(); | |
| } | |
| void loop() { | |
| // here's a String with empty spaces at the end (called white space): | |
| String stringOne = "Hello! "; | |
| Serial.print(stringOne); | |
| Serial.print("<--- end of string. Length: "); | |
| Serial.println(stringOne.length()); | |
| // trim the white space off the string: | |
| stringOne.trim(); | |
| Serial.print(stringOne); | |
| Serial.print("<--- end of trimmed string. Length: "); | |
| Serial.println(stringOne.length()); | |
| // do nothing while true: | |
| while (true); | |
| } | |