Blockchain Technology: Solidity Tutorials -Part-I.

Solidity is a high-level language whose syntax is similar to that of JavaScript and it is designed to compile to code for the Ethereum Virtual Machine. This tutorial provides a basic introduction to Solidity and assumes some knowledge of the Ethereum Virtual Machine and programming in general. For more details, please see the Solidity specficiation (yet to be written). This tutorial does not cover features like the natural language documentation or formal verification and is also not meant as a final specification of the language.

You can start using Solidity in your browser, with no need to download or compile anything. This application only supports compilation - if you want to run the code or inject it into the blockchain, you have to use a client like AlethZero.

Simple Example

contract SimpleStorage {
    uint storedData;
    function set(uint x) {
        storedData = x;
    }
    function get() constant returns (uint retVal) {
        return storedData;
    }
}

uint storedData declares a state variable called storedData of type uint (unsigned integer of 256 bits) whose position in storage is automatically allocated by the compiler. The functions set and get can be used to modify or retrieve the value of the variable.