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String.substring()
Description
Get a substring of a String. The starting index is inclusive (the corresponding character is included in the substring), but the optional ending index is exclusive (the corresponding character is not included in the substring). If the ending index is omitted, the substring continues to the end of the String.
Syntax
myString.substring(from)
myString.substring(from, to)
Parameter Values
- myString: a variable of type String.
- from: the index to start the substring at.
- to (optional): the index to end the substring before.
Return Values
- The substring.
Example Code
void setup() {
Serial.begin(9600);
String myString = "ArduinoGetStarted.com";
String sub = myString.substring(0, 7);
Serial.println(myString);
Serial.println(sub);
}
void loop() {
}
The result on Serial Monitor:
COM6
ArduinoGetStarted.com
Arduino
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.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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