Reference   Language | Libraries | Comparison | Changes

String

c_str()

Description

Converts the contents of a string as a C-style, null-terminated string. Note that this gives direct access to the internal String buffer and should be used with care. In particular, you should never modify the string through the pointer returned. When you modify the String object, or when it is destroyed, any pointer previously returned by c_str() becomes invalid and should not be used any longer.

Syntax

string.c_str()

Parameters

none

Returns

A pointer to the C-style version of the invoking string.

See also

• lastIndexOf()
• startsWith()
• endsWith()

Reference Home

Corrections, suggestions, and new documentation should be posted to the Forum.

The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.