Understanding how to use testnets is essential for developing smart contracts on
Ethereum [https://karl.tech/ethereum-in-101-words/]. Here is a basic introduction to
what testnets are and how to use them.
What is a testnet?
Testnets simulate the Ethereum network and EVM
[http://ethereum.stackexchange.com/questions/142/what-was-the-reason-to-invent-the-evm]
. They