Notes

• It is good practice to always include // SPDX-License-Identifier: MIT comment in your solidity file. Without the license identifier, the Solidity Compiler will produce a warning but not error.
• pragma specifies the compiler version of Solidity.
• Use contract to declare a contract in Solidity followed by the contract name HelloWorld and curly brackets.
• You then declare a public variable that is a string with name as greet and assigned value as Hello World!. Make sure you end with semicolon ;.
• You are ready to compile and deploy

Code

Compile and deploy the code block below:

solidity
HelloWorld.sol
Copy
// SPDX-License-Identifier: MIT
// compiler version must be greater than or equal to 0.8.20 and less than 0.9.0
pragma solidity ^0.8.20;

contract HelloWorld {
   string public greet = "Hello World!";
}