Explore bitcoin and ether as decentralized digital currencies, their wallets, transfers, and exchanges, and learn to test smart contracts using ganache and various test nets.

Explore the Solidity programming language, a high-level tool for writing smart contracts on Ethereum, with JavaScript-like syntax, static typing, and the role of pragma and compiler versions.

Learn to update a Solidity contract's state variable count with a public change count function, including incrementing by one, multiplying by two, and observing results via get count in Remix.

Learn to declare and use state variables of different data types in Solidity, including uint, int, string, address, and bytes, with public visibility and on-chain storage.

Define a custom data type with a struct in Solidity, featuring a u int and string fields. Instantiate a public struct instance, deploy via Remix, and inspect its values.

Master Solidity arrays in Remix by building a count elements function, accessing array length, and pushing string values to an array with public and view methods.

Create a database-like structure with mappings by defining a product struct and a uint-to-product mapping, then add products using the add product function with a name and serial number.

Build a send ether contract in remix to transfer ether between accounts, track balances with a public mapping, and use a payable buy token function and wallet transfer.

Build a tip calculator contract with a custom library, extract the calculation into a library function, and deploy via Remix, including importing the library across separate files.

Learn to implement time-based access in Solidity by building a limit-time contract with a custom modifier using block.timestamp, an opening time, and epoch timestamps to gate function execution.

Learn how to create an abstract contract in solidity, use inheritance with a shape example, and implement virtual and override methods to build concrete contracts like a square.