= Solidity =

Solidity is a language used for smart contracts on several blockchains,
including ethereum.

== Structure ==

It is a good guideline to strcutre functions that interact with other contracts
in three phases

1) check conditions
2) perform actions (possibly changing the conditions)
3) Interact with the other contracts

== Keywords ==

- external 
  - applies to a function
  - allows the function to be called from outside of the contract
- payable 
  - applies to a function
  - allows the function to recieve Ether