April 2018
Intermediate to advanced
222 pages
5h 28m
English
Content preview from Solidity Programming Essentials
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Functions
Functions are the heart of Ethereum and Solidity. Ethereum maintains the current state of state variables and executes transaction to change values in state variables. When a function in a contract is called or invoked, it results in the creation of a transaction. Functions are the mechanism to read and write values from/to state variables. Functions are a unit of code that can be executed on-demand by calling it. Functions can accept parameters, execute its logic, and optionally return values to the caller. They can be named as well as anonymous. Solidity provides named functions with the possibility of only one unnamed function in a contract called the fallback function. We will know more about fallback functions later in the ...
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