Ethereum provides the solc compiler, which provides a command-line interface to compile .sol files. Visit http://solidity.readthedocs.io/en/develop/installing-solidity.html#binary-packages to find instructions to install it and visit https://Solidity.readthedocs.io/en/develop/using-the-compiler.html to find instructions on how to use it. We won't be using the solc compiler directly; instead, we will be using solcjs and Solidity browser. Solcjs allows us to compile Solidity programmatically in Node.js, whereas browser Solidity is an IDE, which is suitable for small contracts.
For now, let's just compile the preceding contract using a browser Solidity provided by Ethereum. Learn more about it at https://Ethereum.github.io/browser-Solidity/. You can also download this browser Solidity source code and use it offline. Visit https://github.com/Ethereum/browser-Solidity/tree/gh-pages to download it.
A major advantage of using this browser Solidity is that it provides...