Why Solidity is the language of Ethereum in Blockchain / Solidity - See It in Action

Why Solidity is the Language of Ethereum

📖 Scenario: You want to understand why Solidity is the main language used to write smart contracts on Ethereum blockchain. Smart contracts are like digital agreements that run automatically when conditions are met.

🎯 Goal: Build a simple Solidity smart contract that shows basic features of Solidity and understand why it fits Ethereum development.

📋 What You'll Learn

Create a simple Solidity contract with a state variable

Add a function to update the state variable

Add a function to read the state variable

Print the stored value after update

💡 Why This Matters

🌍 Real World

Smart contracts automate agreements like payments, voting, or ownership on Ethereum blockchain.

💼 Career

Understanding Solidity is essential for blockchain developers building decentralized applications (dApps) on Ethereum.

1

Create a Solidity contract with a state variable

Write a Solidity contract named SimpleStorage with a public uint variable called storedData initialized to 0. Use Solidity version pragma ^0.8.0.

Blockchain / Solidity

pragma solidity ^0.8.0;

contract SimpleStorage {
    // Your code here
}

Need a hint?

Start with the pragma line, then define the contract and the public variable.

2

Add a function to update the stored data

Inside the SimpleStorage contract, add a public function named set that takes a uint parameter called x and sets storedData to x.

Blockchain / Solidity

pragma solidity ^0.8.0;

contract SimpleStorage {
    uint public storedData = 0;

    // Your code here
}

Need a hint?

Define a public function named set that updates the storedData variable.

3

Add a function to read the stored data

Add a public view function named get that returns the current value of storedData as a uint.

Blockchain / Solidity

pragma solidity ^0.8.0;

contract SimpleStorage {
    uint public storedData = 0;

    function set(uint x) public {
        storedData = x;
    }

    // Your code here
}

Need a hint?

Create a public view function named get that returns storedData.

4

Test the contract by setting and getting the value

Write a comment showing how to call set(42) and then call get() to get the stored value 42.

Blockchain / Solidity

pragma solidity ^0.8.0;

contract SimpleStorage {
    uint public storedData = 0;

    function set(uint x) public {
        storedData = x;
    }

    function get() public view returns (uint) {
        return storedData;
    }
}

// Your code here

Need a hint?

Write comments showing how to use the set and get functions with the value 42.