Description

The String reserve() function allows you to allocate a buffer in memory for manipulating Strings.

Syntax

myString.reserve(size)

Parameters

• myString: a variable of type String.
• size: the number of bytes in memory to save for String manipulation. Allowed data types: unsigned int.

Returns

1 on success, 0 on failure.

Example Code

    String myString;

    void setup() {
      // initialize serial and wait for port to open:
      Serial.begin(9600);
      while (!Serial) {
        ; // wait for serial port to connect. Needed for native USB
      }

      myString.reserve(26);
      myString = "i=";
      myString += "1234";
      myString += ", is that ok?";

      // print the String:
      Serial.println(myString);
    }

    void loop() {
      // nothing to do here
    }

See also

• String Tutorials