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String Case Change Functions
The String case change functions allow you to change the case of a String. They work just as their names imply. toUpperCase() changes the whole string to upper case characters, and toLowerCase() changes the whole String to lower case characters. Only the characters A to Z or a to z are affected.
Hardware Required:
- Arduino Board
Circuit
There is no circuit for this example, though your Arduino must be connected to your computer via USB.
image developed using Fritzing. For more circuit examples, see the Fritzing project page
Code
/*
String Case changes
Examples of how to change the case of a string
created 27 July 2010
by Tom Igoe
http://arduino.cc/en/Tutorial/StringCaseChanges
This example code is in the public domain.
*/
void setup() {
Serial.begin(9600);
Serial.println("\n\nString case changes:");
}
void loop() {
// toUpperCase() changes all letters to upper case:
String stringOne = "<html><head><body>";
Serial.println(stringOne);
stringOne = (stringOne.toUpperCase());
Serial.println(stringOne);
// toLowerCase() changes all letters to lower case:
String stringTwo = "</BODY></HTML>";
Serial.println(stringTwo);
stringTwo = stringTwo.toLowerCase();
Serial.println(stringTwo);
// do nothing while true:
while(true);
}
String Case changes
Examples of how to change the case of a string
created 27 July 2010
by Tom Igoe
http://arduino.cc/en/Tutorial/StringCaseChanges
This example code is in the public domain.
*/
void setup() {
Serial.begin(9600);
Serial.println("\n\nString case changes:");
}
void loop() {
// toUpperCase() changes all letters to upper case:
String stringOne = "<html><head><body>";
Serial.println(stringOne);
stringOne = (stringOne.toUpperCase());
Serial.println(stringOne);
// toLowerCase() changes all letters to lower case:
String stringTwo = "</BODY></HTML>";
Serial.println(stringTwo);
stringTwo = stringTwo.toLowerCase();
Serial.println(stringTwo);
// do nothing while true:
while(true);
}