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Arduino/build/shared/examples/08.Strings/StringLengthTrim/StringLengthTrim.ino

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/*
String length() and trim()
Examples of how to use length() and trim() in a String
created 27 July 2010
modified 2 Apr 2012
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by Tom Igoe
http://arduino.cc/en/Tutorial/StringLengthTrim
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This example code is in the public domain.
*/
void setup() {
// Open serial communications and wait for port to open:
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Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
// send an intro:
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Serial.println("\n\nString length() and trim():");
Serial.println();
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}
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();
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Serial.print(stringOne);
Serial.print("<--- end of trimmed string. Length: ");
Serial.println(stringOne.length());
// do nothing while true:
while(true);
}