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- toString() uses a stream for conversion while genes() returns a direct reference to the string, without copies in between. The speed up is very small compared to the improvement from switching to storing a string of abbreviations instead of a vector of step names inside chromosomes but there's basically no downside to this change so it's still worth it. |
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The Solidity Contract-Oriented Programming Language
You can talk to us on 
. Questions, feedback and suggestions are welcome!
Solidity is a statically typed, contract-oriented, high-level language for implementing smart contracts on the Ethereum platform.
Table of Contents
Background
Solidity is a statically-typed curly-braces programming language designed for developing smart contracts that run on the Ethereum Virtual Machine. Smart contracts are programs that are executed inside a peer-to-peer network where nobody has special authority over the execution, and thus they allow to implement tokens of value, ownership, voting and other kinds of logics.
When deploying contracts, you should use the latest released version of Solidity. This is because breaking changes as well as new features and bug fixes are introduced regularly. We currently use a 0.x version number to indicate this fast pace of change.
Build and Install
Instructions about how to build and install the Solidity compiler can be found in the Solidity documentation.
Example
A "Hello World" program in Solidity is of even less use than in other languages, but still:
pragma solidity >=0.6.0 <0.8.0;
contract HelloWorld {
function helloWorld() external pure returns (string memory) {
return "Hello, World!";
}
}
To get started with Solidity, you can use Remix, which is an browser-based IDE. Here are some example contracts:
Documentation
The Solidity documentation is hosted at Read the docs.
Development
Solidity is still under development. Contributions are always welcome! Please follow the Developers Guide if you want to help.
You can find our current feature and bug priorities for forthcoming releases in the projects section.
Maintainers
License
Solidity is licensed under GNU General Public License v3.0.
Some third-party code has its own licensing terms.
Security
The security policy may be found here.