Solidity: Environment setup + Hello World !!

In the previous Session, we learned about Evm and SmartContract where EVM is Ethereum Virtual Machine that is a run time Environment for smart-contract in Ethereum. and smart contract is a specialized programs to perform certain tasks written in solidity.

let's know something more

Remix IDE - Remix is a web platform that enables us to build, run and test smart contracts locally without any mess.

Link to Remix: https://remix.ethereum.org/

after loading, you would be able to see the workspace here!!

don't worry if it looks complex to you it will be easy as the time-passes by

we can see some folders

• Contracts

  we will be developing contracts in the Contracts folder.

• Scripts

  Scripts are the javascript files used to deploy contracts on the network, we will be seeing those tests in later sessions

• Test

  Scripts are the javascript files used to test contracts on the network.

• .deps

  it is the same as node_modules. simply storing dependencies in a folder.

Finally - Hello World !!

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

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

so this is a very simple and basic program of solidity

program structure

• License

  

  it necessary to mention the license or otherwise the compiler will give you a warning.

• Compiler version

  

  declaring which compiler version we need to use.

• Contract

  

  so here Contract is very much similar to Class in OOPs below the contract we are simply declaring a variable named greet.

    // see how similar solidity and javascript is
    class HelloWorld{
        let greet = "Hello World !!"
    }
  

  

Hey!!! you have completed you very basic lessons on solidity now we will be diving in to programming stuff in next lessons.

Keep Learning Keep Building...