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String.toUpperCase()
Description
Get an upper-case version of a String. As of 1.0, toUpperCase() modifies the String in place rather than returning a new one.
Syntax
myString.toUpperCase()
Parameter Values
- myString: a variable of type String.
Return Values
- Nothing
Example Code
String myString;
void setup() {
Serial.begin(9600);
myString = "ArduinoGetStarted.com";
Serial.println(myString); // string before
myString.toUpperCase();
Serial.println(myString); // string after
}
void loop() {
}
The result on Serial Monitor:
COM6
ArduinoGetStarted.com
ARDUINOGETSTARTED.COM
Autoscroll
Clear output
9600 baud
Newline
※ NOTES AND WARNINGS:
If the string is modified, it is highly recommended using String.reserve() to prevent the memory fragmentation issue
See Also
- Language : Arduino - String
- Language : String.c_str()
- Language : String.charAt()
- Language : String.compareTo()
- Language : String.concat()
- Language : String.endsWith()
- Language : String.equals()
- Language : String.equalsIgnoreCase()
- Language : String.getBytes()
- Language : String.indexOf()
- Language : String.lastIndexOf()
- Language : String.length()
- Language : String.remove()
- Language : String.replace()
- Language : String.reserve()
- Language : String.setCharAt()
- Language : String.startsWith()
- Language : String.substring()
- Language : String.toCharArray()
- Language : String.toDouble()
- Language : String.toFloat()
- Language : String.toInt()
- Language : String.toLowerCase()
- Language : String.trim()
- Example : String Tutorials
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