String.length()

Description

Returns the length of the String, in characters. (Note that this doesn't include a trailing null character.)

Syntax

myString.length()

Parameter Values

  • myString: a variable of type String.

Return Values

  • The length of the String in characters.

Example Code

void setup() { Serial.begin(9600); String myString = "Arduino"; int length = myString.length(); Serial.println(length); } void loop() { }

The result on Serial Monitor:

COM6
Send
7
Autoscroll Show timestamp
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

ARDUINO BUY RECOMMENDATION

Arduino UNO R3
Arduino Starter Kit
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