Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Apart from pragma, import, and comments, we can define contracts, libraries, and interfaces at a global level."

A block of code is set as follows:

// This is a single-line comment in Solidity
/* This is a multiline comment
In Solidity. Use this when multiple consecutive lines
Should be commented as a whole */

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

pragma solidity >=0.7.0 <0.9.0;
contract ConversionDemo {
    
    function ConversionExplicitUINT8toUINT256() pure public returns (uint){
     ……
    }

Any command-line input or output is written as follows:

pragma solidity >=0.7.0 <0.9.0;

Tips or important notes

Appear like this.