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

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/*
String Case changes
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Examples of how to change the case of a string
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created 27 July 2010
modified 2 Apr 2012
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by Tom Igoe
http://www.arduino.cc/en/Tutorial/StringCaseChanges
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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 native USB port only
}
// send an intro:
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Serial.println("\n\nString case changes:");
Serial.println();
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}
void loop() {
// toUpperCase() changes all letters to upper case:
String stringOne = "<html><head><body>";
Serial.println(stringOne);
stringOne.toUpperCase();
Serial.println(stringOne);
// toLowerCase() changes all letters to lower case:
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String stringTwo = "</BODY></HTML>";
Serial.println(stringTwo);
stringTwo.toLowerCase();
Serial.println(stringTwo);
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// do nothing while true:
while (true);
}