[Data Types]


A data type used to store a character value. Character literals are written in single quotes, like this: 'A' (for multiple characters - strings - use double quotes: "ABC").

Characters are stored as numbers however. You can see the specific encoding in the ASCII chart. This means that it is possible to do arithmetic on characters, in which the ASCII value of the character is used (e.g. 'A' + 1 has the value 66, since the ASCII value of the capital letter A is 65). See Serial.println reference for more on how characters are translated to numbers.

The size of the char datatype is at least 8 bits. It’s recommended to only use char for storing characters. For an unsigned, one-byte (8 bit) data type, use the byte data type.


char var = val;


var: variable name
val: the value to assign to that variable

Example Code

char myChar = 'A';
char myChar = 65; // both are equivalent

See also

  • Language String()

  • Language array

  • Language bool

  • Language boolean

  • Language byte

  • Language double

  • Language float

  • Language int

  • Language long

  • Language short

  • Language size_t

  • Language string

  • Language unsigned char

  • Language unsigned int

  • Language unsigned long

  • Language void

  • Language word