_title: Constants

_section: Constants @<constants>

The **ethers.contants** Object contains commonly used values.

_heading: Importing

_code: constants-import.js


_subsection: Bytes

_property: constants.AddressZero => string<[Address](address)>  @<constants-addresszero> @SRC<constants>
The Address Zero, which is 20 bytes (40 nibbles) of zero.

_property: constants.HashZero => string<[[datahexstring]]<32>>  @<constants-hashzero> @SRC<constants>
The Hash Zero, which is 32 bytes (64 nibbles) of zero.


_subsection: Strings

_property: constants.EtherSymbol => string  @<constants-ethersymbol> @SRC<constants>
The Ether symbol, **&Xi;**.


_subsection: BigNumber

_property: constants.NegativeOne => [[bignumber]]  @<constants-negativeone> @SRC<constants>
The BigNumber value representing ``"-1"``.

_property: constants.Zero => [[bignumber]]  @<constants-zero> @SRC<constants>
The BigNumber value representing ``"0"``.

_property: constants.One => [[bignumber]]  @<constants-one> @SRC<constants>
The BigNumber value representing ``"1"``.

_property: constants.Two => [[bignumber]]  @<constants-two> @SRC<constants>
The BigNumber value representing ``"2"``.

_property: constants.WeiPerEther => [[bignumber]]  @<constants-weiperether> @SRC<constants>
The BigNumber value representing ``"1000000000000000000"``, which is the
number of Wei per Ether.

_property: constants.MaxUint256 => [[bignumber]]  @<constants-maxuint256> @SRC<constants>
The BigNumber value representing the maximum ``uint256`` value.