double

[Data Types]

Description

Double precision floating point number. On the Uno and other ATMEGA based boards, this occupies 4 bytes. That is, the double implementation is exactly the same as the float, with no gain in precision.

On the Arduino Due, doubles have 8-byte (64 bit) precision.

Notes and Warnings

Users who borrow code from other sources that includes double variables may wish to examine the code to see if the implied precision is different from that actually achieved on ATMEGA based Arduinos.

See also

  • LANGUAGE String()

  • LANGUAGE array

  • LANGUAGE boolean

  • LANGUAGE byte

  • LANGUAGE char

  • LANGUAGE float

  • LANGUAGE int

  • LANGUAGE long

  • LANGUAGE short

  • LANGUAGE string

  • LANGUAGE unsignedChar

  • LANGUAGE unsignedInt

  • LANGUAGE unsignedLong

  • LANGUAGE void

  • LANGUAGE word