Solidity - Comments Last Updated : 26 Apr, 2023 Comments Improve Suggest changes Like Article Like Report Comments are an important aspect of programming as they help in providing clarity and understanding to the code. They allow developers to document the code and explain its purpose, making it easier for others to read and maintain the code. Solidity, being a programming language, also supports the use of comments. They are simply added for the convenience of the programmer and anyone else who might read the code in the future. Why do People Avoid Comments? Unfortunately, many programmers neglect to include comments in their code. Reason being: Lack of Skills: Solidity developers might find it challenging to explain the intent of the code in simple English language, thus they avoid comments when the code is working fine.Limited understanding of a specific portion of code: Sometimes solidity developers have a limited understanding of the specific part of the code that could induce the inability to explain the concerned part of the code. Misleading comments: Comments that are outdated or inaccurate or don't explain correctly can lead to confusion and errors, especially while working with multiple developers on the same project.Importance of Comments in Solidity In Solidity, comments are extremely important for improving the readability of the code. Without the proper comments, even seasoned programmers may find it difficult to understand Solidity's complex syntax. The purpose of the code, the logic behind it, and instructions on how to use it properly can all be clarified with the aid of comments. Explain complex logic: Comments in solidity can be very useful for explaining complex algorithms and business logic making it easy for other developers to understand.Document code: Well-documented code can really help in development. By documenting functions, variables, and contracts, comments can help other developers understand the codebase easily and its architecture.Improve maintenance: It improves the maintainability of the code. By providing clear and concise comments, developers can make it easier to maintain and update the codebase, reducing bugs or code breakage.Increase collaboration: It can increase collaboration between the developers by making it easier for others to contribute to the codebase, understand the intended behavior of the contract, and identify potential issues.Time-saving: Adding comments in solidity code helps to save time by avoiding confusion about the reasons for a specific portion of the code. These helps to identify the working of the code quickly. Isolate the Important Blocks of Code: Comments helps to avoid unwanted troubles in the code in case of code upgrades. The warning comments for the specific lines of code can help to avoid unwanted changes which might affect the intent of the whole program.Maintaining track of tasks: Comments in Solidity code helps to stay in right direction and also helps to discover susequent tasks that one needs to achieve within the smart contract or decentralized application.Types of Comments There are three types of comments in Solidity: 1. Single-Line Comments Comments that are one line long and are separated by two forward slashes (/). They can be added to the end of a line of code, and they will continue until the end of the line. It's common practice to use single-line comments to give a succinct explanation of what the code is doing. Syntax: // Comment 2. Multi-Line Comments These are comments that are enclosed in /* */. They can span multiple lines and be used to give a more thorough explanation of the code. Syntax: /* Comment */ 3. NatSpec Comments Solidity code documentation is produced using these unique types of comments. They can contain details about the behavior, input, and output parameters of the function and are written in a particular format. NatSpec comments can be used to generate documentation for Solidity.NatSpec comments are written in a specific format, using tags to specify the purpose of each comment. The following table shows some of the most common tags used in NatSpec comments: TagDescriptionUsed before@devIt is a developer's commentfunctions, contracts, and enums@noticeIt is high-level information about a particular functionfunctions@paramIt is the description of a function parameterfunction parameters@returnIt is the description of a function return valuefunctions@titleIt is the title of a contract or librarycontract or library Syntax: /** * @title Title of contract * @dev Dev Comment * @param parameter * @return return value. */ Conclusion In conclusion, comments are an important aspect of programming, and Solidity supports the use of both single-line and multi-line comments. They help in documenting the code, and explaining its purpose, and can also be used to disable code temporarily during development or testing. It's a good practice to use comments in your Solidity code to make it easier to understand and maintain. Comment More infoAdvertise with us Next Article Solidity - Types T taran910 Follow Improve Article Tags : Solidity Solidity-Basics Similar Reads Solidity Tutorial Solidity tutorial is designed for those who want to learn Solidity programming language and for experienced Solidity developers looking to gain a deeper understanding of the language. The following Solidity tutorial explains the basic and advanced concepts of Solidity programming language and provid 6 min read Solidity BasicsIntroduction to SoliditySolidity is a brand-new programming language created by Ethereum which is the second-largest market of cryptocurrency by capitalization, released in the year 2015 and led by Christian Reitwiessner. 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Smart contracts are very different from traditional software programs. They are immutable once deployed on the blockchain. It was because of Ethereum the term smart contract became 4 min read Solidity - CommentsComments are an important aspect of programming as they help in providing clarity and understanding to the code. They allow developers to document the code and explain its purpose, making it easier for others to read and maintain the code. Solidity, being a programming language, also supports the us 4 min read Solidity - TypesSolidity is a statically typed language, which implies that the type of each of the variables should be specified. Data types allow the compiler to check the correct usage of the variables. The declared types have some default values called Zero-State, for example for bool the default value is False 4 min read Variable and OperatorsSolidity - VariablesA Variable is basically a placeholder for the data which can be manipulated at runtime. 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One important concept in Solidity is conversions, which allow you to change the type of a variable or expression. The article focuses on discussing three types of conversions in Solidity. The follow 6 min read Solidity - Ether UnitsIn the world of Ethereum smart contracts, understanding how Ether (ETH) and its subunits work is crucial. Solidity is the programming language used to write these smart contracts, and it interacts directly with Ether, the cryptocurrency of the Ethereum network. This article focuses on discussing Eth 7 min read Solidity - Special VariablesThere exist special variables and functions in solidity which exist in the global namespace and are mainly used to provide information about the blockchain or utility functions. They are of two types: 1) Block and Transaction Properties: Block Transaction Properties block.coinbase (address payable)C 3 min read Solidity - Style GuideSolidity is a computer programming language used to create Ethereum smart contracts. These contracts self-execute. The code and the agreements contained therein are enforced by the blockchain network. Solidity is a high-level language, meaning that it is designed to be human-readable and easy to wri 13 min read Solidity FunctionsSolidity - FunctionsA function is basically a group of code that can be reused anywhere in the program, which generally saves the excessive use of memory and decreases the runtime of the program. Creating a function reduces the need of writing the same code over and over again. With the help of functions, a program can 4 min read Solidity - Function ModifiersFunction behavior can be changed using function modifiers. Function modifier can be used to automatically check the condition prior to executing the function. These can be created for many different use cases. Function modifier can be executed before or after the function executes its code. The modi 8 min read Solidity - View and Pure FunctionsThe view functions are read-only function, which ensures that state variables cannot be modified after calling them. If the statements which modify state variables, emitting events, creating other contracts, using selfdestruct method, transferring ethers via calls, Calling a function which is not 'v 2 min read Solidity - Fall Back FunctionThe solidity fallback function is executed if none of the other functions match the function identifier or no data was provided with the function call. Only one unnamed function can be assigned to a contract and it is executed whenever the contract receives plain Ether without any data. To receive E 3 min read Solidity Function OverloadingFunction overloading in Solidity lets you specify numerous functions with the same name but varying argument types and numbers.Solidity searches for a function with the same name and parameter types when you call a function with certain parameters. Calls the matching function. Compilation errors occ 1 min read Mathematical Operations in SoliditySolidity is a brand-new programming language created by the Ethereum which is the second-largest market of cryptocurrency by capitalization, released in the year 2015 led by Christian Reitwiessner. Ethereum is a decentralized open-source platform based on blockchain domain, used to run smart contrac 6 min read Solidity AdvancedSolidity - Basics of ContractsSolidity Contracts are like a class in any other object-oriented programming language. They firmly contain data as state variables and functions which can modify these variables. When a function is called on a different instance (contract), the EVM function call happens and the context is switched i 4 min read Solidity - InheritanceInheritance is one of the most important features of the object-oriented programming language. 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Assembly language is tied to either physical or a virtual machine as their implementation is an instruction set, and these instructions tell the CPU to do that fundamen 4 min read What are Events in Solidity?Solidity Events are the same as events in any other programming language. An event is an inheritable member of the contract, which stores the arguments passed in the transaction logs when emitted. Generally, events are used to inform the calling application about the current state of the contract, w 2 min read Solidity - Error HandlingSolidity has many functions for error handling. Errors can occur at compile time or runtime. Solidity is compiled to byte code and there a syntax error check happens at compile-time, while runtime errors are difficult to catch and occurs mainly while executing the contracts. Some of the runtime erro 6 min read Top 50 Solidity Interview Questions and Answers Solidity is an object-oriented programming language used to implement smart contracts on blockchain platforms like Ethereum, which generates transaction records in the system. To excel in your journey toward top companies as a Solidity developer, you need to master some important Solidity Interview 15+ min read Like