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String.compareTo()
Description
Compares two Strings, testing whether one comes before or after the other, or whether they're equal. The strings are compared character by character, using the ASCII values of the characters. That means, for example, that 'a' comes before 'b' but after 'A'. Numbers come before letters.
Syntax
myString.compareTo(myString2)
Parameter Values
- myString: a variable of type String.
- myString2: another variable of type String.
Return Values
- a negative number: if myString comes before myString2.
- 0: if String equals myString2.
- a positive number: if myString comes after myString2.
Example Code
void setup() {
Serial.begin(9600);
String myString = "Arduino";
String myString2 = "ArduinoGetStarted.com";
int result = myString.compareTo(myString2);
Serial.println(result);
}
void loop() {
}
The result on Serial Monitor:
COM6
-71
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.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.toUpperCase()
- Language : String.trim()
- Example : String Tutorials
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