String.toCharArray()

Description

Copies the String's characters to the supplied buffer.

Syntax

myString.toCharArray(buf, len)

Parameter Values

  • myString: a variable of type String.
  • buf: the buffer to copy the characters into. Allowed data types: array of char.
  • len: the size of the buffer. Allowed data types: unsigned int.

Return Values

  • Nothing

Example Code

void setup() { Serial.begin(9600); String myString = "Arduino"; byte buffer[myString.length() + 1]; myString.toCharArray(buffer, myString.length() + 1); for (int i = 0; i < myString.length() + 1; i++) Serial.println(buffer[i], HEX); } void loop() { }

The result on Serial Monitor:

COM6
Send
41 72 64 75 69 6E 6F 0
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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