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Solidity Programming Essentials

You're reading from   Solidity Programming Essentials A guide to building smart contracts and tokens using the widely used Solidity language

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Product type Paperback
Published in Jun 2022
Publisher Packt
ISBN-13 9781803231181
Length 412 pages
Edition 2nd Edition
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Concepts
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Author (1):
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 Modi Modi
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Modi
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Toc

Table of Contents (21) Chapters Close

Preface 1. Part 1: The Fundamentals of Solidity and Ethereum
2. Chapter 1: An Introduction to Blockchain, Ethereum, and Smart Contracts FREE CHAPTER 3. Chapter 2: Installing Ethereum and Solidity 4. Chapter 3: Introducing Solidity 5. Chapter 4: Global Variables and Functions 6. Chapter 5: Expressions and Control Structures 7. Part 2: Writing Robust Smart Contracts
8. Chapter 6: Writing Smart Contracts 9. Chapter 7: Solidity Functions, Modifiers, and Fallbacks 10. Chapter 8: Exceptions, Events, and Logging 11. Chapter 9: Basics of Truffle and Unit Testing 12. Chapter 10: Debugging Contracts 13. Part 3: Advanced Smart Contracts
14. Chapter 11: Assembly Programming 15. Chapter 12: Upgradable Smart Contracts 16. Chapter 13: Writing Secure Contracts 17. Chapter 14: Writing Token Contracts 18. Chapter 15: Solidity Design Patterns 19. Assessments 20. Other Books You May Enjoy

Understanding continue

Loops are based on expressions. The logic of the expression decides the continuity of the loop. However, there are times when you are in between loop execution and want to go back to the first line of code without executing the rest of the code for the next iteration. The continue statement helps us do that.

In the following code block, the for loop is executed till the end; however, the values after 5 are not logged at all:

// SPDX-License-Identifier: MIT
pragma solidity >=0.7.0 <0.9.0;
contract ForLoopExampleContinue {
    
    mapping (uint => uint) blockNumber;
    uint counter;
    
    event uintNumber(uint);
    function setNumber() public  {
        blockNumber[counter++] = block.number;
    }
    function getNumbers() public {
...
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