Summary

This is the first chapter that has explored Solidity in depth. This chapter introduced Solidity and the layout of Solidity files, including elements that can be declared at the top level in it. Constructs such as pragma, contracts, and elements of contracts were discussed from a layout perspective. A complete immersion into the world of Solidity data types forms the core of this chapter. Value types and reference types were discussed in depth, and types such as int, uint, fixed-sized byte arrays, bytes, arrays, strings, structures, enumerations, addresses, Booleans, and mappings were discussed in great length along with examples. Solidity provides additional data locations from complex types such as structs and arrays, which were also discussed in depth along with the rules that govern their usage. Solidity variables and their types are foundational concepts for writing smart contracts, and this knowledge will help you to write functional ones.

In the next chapter, we will...