enums in solidity
Enums in Solidity
Enums in Solidity are used to create a new user-defined type. They are explicitly convertible to and from all integer types but implicit conversion is not allowed. Enums are defined using the enum
keyword and can contain a list of named constants. Each constant is assigned a value, which starts at 0 and increments by 1 for each subsequent constant if not specified. Enums are useful for representing a set of related options or choices within a contract.
Example:
pragma solidity ^0.8.0;
contract EnumsExample {
enum State { Inactive, Active, Deprecated }
State public state;
constructor() {
state = State.Inactive;
}
function activate() public {
state = State.Active;
}
function deactivate() public {
state = State.Inactive;
}
}
Enums can be defined within a contract and used to represent state transitions or options within the contract.
Enums provide a way to create a set of named constants in Solidity, making the code more readable and self-explanatory.
Enums are an important feature in Solidity for defining custom types and improving code clarity.