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Solidity Programming Essentials

You're reading from   Solidity Programming Essentials A beginner's guide to build smart contracts for Ethereum and blockchain

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Product type Paperback
Published in Apr 2018
Publisher Packt
ISBN-13 9781788831383
Length 222 pages
Edition 1st Edition
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Author (1):
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Ritesh Modi Ritesh Modi
Author Profile Icon Ritesh Modi
Ritesh Modi
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Table of Contents (12) Chapters Close

Preface 1. Introduction to Blockchain, Ethereum, and Smart Contracts FREE CHAPTER 2. Installing Ethereum and Solidity 3. Introducing Solidity 4. Global Variables and Functions 5. Expressions and Control Structures 6. Writing Smart Contracts 7. Functions, Modifiers, and Fallbacks 8. Exceptions, Events, and Logging 9. Truffle Basics and Unit Testing 10. Debugging Contracts 11. Other Books You May Enjoy

The for loop

One of the most famous and most used loops is the for loop, and we can use it in Solidity. The general structure of a for loop is as follows:

for (initialize loop counter; check and test the counter; increase the value of counter;) {
Execute multiple instructions here
}

for is a keyword in Solidity and it informs the compiler that it contains information about looping a set of instructions. It is very similar to the while loop; however it is more succinct and readable since all information can be viewed in a single line.

The following code example shows the same solution: looping through a mapping. However, it uses the for loop instead of the while loop. The i variable is initialized, incremented by 1 in every iterator, and checked to see whether it is less than the value of counter. The loop will stop as soon as the condition...

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