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An Introductory Guide to Create Your First Smart Contract on Ethereum

Welcome to our tutorial on how to create a smart contract on Ethereum using Solidity, the most popular language for Ethereum smart contracts. By the end of this guide, you will be familiar with basics of Ethereum smart contracts and will be able to create and deploy your own contract on the Ethereum blockchain.

Understanding Ethereum Smart Contracts

Working on the Ethereum blockchain, a smart contract is a self-executing contract with the terms of the agreement directly written into lines of code. The code controls the contract execution, and transactions are trackable and irreversible.

Step 1: Set up Your Development Environment

Before you start coding, you’ll need to set up a development environment. We recommend using Remix, an open-source tool used for writing Solidity contracts. Opening Remix in your web browser will provide you with an environment where you can write, test, and deploy your contract.

Step 2: Write Your First Smart Contract

Create a new file in Remix, and name it ‘HelloWorld.sol’. In the editor, start by setting the compiler version. This line tells the compiler we are using Solidity version 0.5.1 or any newer version that doesn’t break functionality up to version 0.9.9. The basic structure of a contract looks something like this:

pragma solidity ^0.5.1;

contract HelloWorld {
function sayHello() public pure returns(string memory){
return “Hello, World!”;

Step 3: Compile the Contract

Click the second icon from the top on the left panel of Remix to open the Solidity Compiler. After making sure the compiler version matches the version in your contract, click ‘Compile HelloWorld.sol’.

Step 4: Deploy the Contract

After the contract has been compiled, it’s ready to be deployed to the Ethereum blockchain. In the ‘Deploy & Run Transactions’ tab, select ‘JavaScript VM’ from the ‘Environment’ dropdown list. This is a simulated blockchain that Remix provides for testing.

Click on the ‘Deploy’ button to deploy your contract. Once deployed, Remix creates an instance of the contract in the ‘Deployed Contracts’ section.

Step 5: Interact with the Contract

Under ‘Deployed Contracts’, you’ll see the contract ‘HelloWorld’. By expanding it, you’ll be presented with an interface to interact with your function ‘sayHello’. Click on it, and the message “Hello, World!” will appear in the console.

Congratulations! You’ve just written, compiled, deployed, and interacted with your first Ethereum smart contract. The world of blockchain development awaits you!

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