## Reference.StringConstructor History

June 01, 2015, at 09:43 AM by Arturo -
Changed lines 55-63 from:

String stringOne = "Hello String"; // using a constant String String stringOne = String('a'); // converting a constant char into a String String stringTwo = String("This is a string"); // converting a constant string into a String object String stringOne = String(stringTwo + " with more"); // concatenating two strings String stringOne = String(13); // using a constant integer String stringOne = String(analogRead(0), DEC); // using an int and a base String stringOne = String(45, HEX); // using an int and a base (hexadecimal) String stringOne = String(255, BIN); // using an int and a base (binary) String stringOne = String(millis(), DEC); // using a long and a base

to:

String stringOne = "Hello String"; // using a constant String String stringOne = String('a'); // converting a constant char into a String String stringTwo = String("This is a string"); // converting a constant string into a String object String stringOne = String(stringTwo + " with more"); // concatenating two strings String stringOne = String(13); // using a constant integer String stringOne = String(analogRead(0), DEC); // using an int and a base String stringOne = String(45, HEX); // using an int and a base (hexadecimal) String stringOne = String(255, BIN); // using an int and a base (binary) String stringOne = String(millis(), DEC); // using a long and a base String stringOne = String(5.698, 3); // using a float and the decimal places

June 01, 2015, at 09:29 AM by Arturo -
Changed lines 14-15 from:
• a float, using a specified decimal position
to:
• a float or double, using a specified decimal palces
Changed lines 38-39 from:

String(val, base)

to:

String(val, base)
String(val, decimalPlaces)

Changed lines 42-44 from:

val: a variable to format as a String - string, char, byte, int, long, unsigned int, unsigned long
base (optional) - the base in which to format an integral value

to:

val: a variable to format as a String - string, char, byte, int, long, unsigned int, unsigned long, float, double
base (optional) - the base in which to format an integral value
decimalPlaces (only if val is float or double) - the desired decimal places

June 01, 2015, at 09:24 AM by Arturo -
Changed lines 14-15 from:
to:
• a float, using a specified decimal position
Changed lines 18-19 from:

`String thisString = String(13)`

to:
Changed lines 24-25 from:

`String thisString = String(13, HEX)`

to:
Changed lines 30-31 from:

`String thisString = String(13, BIN)`

to:
Changed lines 51-52 from:

[@

to:
Changed lines 62-63 from:
``` @]
```
to:
February 12, 2013, at 01:03 PM by Roberto Guido - corrected binary conversion. Thanks chipselden for report
Changed lines 27-28 from:

gives you the String "1011", which is the binary representation of 13.

to:

gives you the String "1101", which is the binary representation of 13.

January 30, 2012, at 05:01 PM by Scott Fitzgerald -
Changed lines 57-58 from:
to:
August 13, 2010, at 11:47 PM by David A. Mellis -
Changed lines 1-2 from:
to:
August 08, 2010, at 07:24 PM by David A. Mellis -
August 08, 2010, at 07:18 PM by David A. Mellis -
Changed lines 6-7 from:

Constructs an instance of the String class. There are multiple versions that construct Strings from different data types (i.e. format them as sequences of characters).

to:

Constructs an instance of the String class. There are multiple versions that construct Strings from different data types (i.e. format them as sequences of characters), including:

• a constant string of characters, in double quotes (i.e. a char array)
• a single constant character, in single quotes
• another instance of the String object
• a constant integer or long integer
• a constant integer or long integer, using a specified base
• an integer or long integer variable
• an integer or long integer variable, using a specified base

Constructing a String from a number results in a string that contains the ASCII representation of that number. The default is base ten, so

`String thisString = String(13)`

gives you the String "13". You can use other bases, however. For example,

`String thisString = String(13, HEX)`

gives you the String "D", which is the hexadecimal representation of the decimal value 13. Or if you prefer binary,

`String thisString = String(13, BIN)`

gives you the String "1011", which is the binary representation of 13.

August 08, 2010, at 07:11 PM by David A. Mellis -
Changed line 13 from:

val: a variable to format as a String - string, char, byte, int, long, unsigned int, unsigned long

to:

val: a variable to format as a String - string, char, byte, int, long, unsigned int, unsigned long\\

August 08, 2010, at 07:11 PM by David A. Mellis -

## String()

#### Description

Constructs an instance of the String class. There are multiple versions that construct Strings from different data types (i.e. format them as sequences of characters).

#### Syntax

String(val)
String(val, base)

#### Parameters

val: a variable to format as a String - string, char, byte, int, long, unsigned int, unsigned long base (optional) - the base in which to format an integral value

#### Returns

an instance of the String class

### Examples

All of the following are valid declarations for Strings.

```String stringOne = "Hello String";                     // using a constant String
String stringOne =  String('a');                       // converting a constant char into a String
String stringTwo =  String("This is a string");        // converting a constant string into a String object
String stringOne =  String(stringTwo + " with more");  // concatenating two strings
String stringOne =  String(13);                        // using a constant integer
String stringOne =  String(analogRead(0), DEC);        // using an int and a base
String stringOne =  String(45, HEX);                   // using an int and a base (hexadecimal)
String stringOne =  String(255, BIN);                  // using an int and a base (binary)
String stringOne =  String(millis(), DEC);             // using a long and a base

```