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String.trim()
Description
Get a version of the String with any leading and trailing whitespace removed. As of 1.0, trim() modifies the String in place rather than returning a new one.
Syntax
myString.trim()
Parameter Values
- myString: a variable of type String.
Return Values
- Nothing
Example Code
String myString;
void setup() {
Serial.begin(9600);
myString = " Arduino ";
Serial.println(myString.length()); // length before trimming
myString.trim();
Serial.println(myString.length()); // length after trimming
Serial.println(myString); // string after trimming
}
void loop() {
}
The result on Serial Monitor:
COM6
10
7
Arduino
Autoscroll
Clear output
9600 baud
Newline
As we can see, the length of the myString before trimming is 10. After trimming, the length is 7. That is because one leading and two trailing whitespace charecters are removed.
※ 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.toUpperCase()
- Example : String Tutorials
※ ARDUINO BUY RECOMMENDATION
| Arduino UNO R3 | |
| Arduino Starter Kit |
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