Enum
The keyword ‘enum’ is used to declare an enumeration type consisting of only some of the selected pre-defined values that are called ‘enumerators’.
- It restricts a variable type to have only certain set of pre-defined values.
- It can be defined inside a contract itself.
Example:
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.25;
contract TransactionState {
// * Defined enum type with 3 enumerators : active, pending, failed
enum State {active, pending, failed}
}
Explanation:
- The above code simply defines an enum type ‘State‘ inside a ‘TranscationState‘ contract. It has 3 enumerators : active, pending and failed.
- You can assign these values to variables of type State.
Unlock the Power of Solidity: Exploring the Essential Keywords for Smart Contract Development
Solidity is a smart contract programming language built solely to develop smart contracts that can be deployed on blockchains. C++ and JavaScript inspired it, an Object Oriented and High-Level language (HLL), that helps developers define the behaviour and rules for a Decentralized Application (Dapp). Smart contract facilitates autonomous, secure, and efficient transaction execution on the blockchain without needing any intermediary (self-executable) and solidity provides the base framework for achieving the same.
It is essential to understand the common keywords used in solidity to solidify your core understanding of the language so in this article, we’ll pin down some prominent keywords that help us develop these smart contracts by embracing the true power of solidity language.
Table of Content
- Contract
- Constructor
- Data Types
- Delete
- Enum
- Function
- Interface
- Import
- Struct
- Visiblity Specifiers
- Exception Handling
- Pragma Directive
- License Defintion
- Modifier
- Data Location
- Global Variables
- Fallback Function
- SelfDestruct
- ‘assembly’ and ‘inline assembly’