**Solidity** is a programming language designed to create smart contracts that run on **blockchain** networks, such as **Ethereum**. Smart contracts are self-executing programs that are stored on the blockchain and automatically execute when certain conditions are met.
### **Solidity language features**:
1. **High-level**: It is written in a style similar to languages such as JavaScript and C++.
2. **EVM-based**: It is designed to run on the Ethereum Virtual Machine (EVM).
3. **Object-oriented**: It supports object-oriented programming.
4. **Various data types**: It supports types such as uint (positive integers), address (wallet addresses), arrays, struct, and others.
5. **Contract management**: It allows for the flexibility and ease of creating and managing smart contracts.
### **Uses**:
1. **Creating digital currencies (Tokens)**: such as ERC-20 and ERC-721 coins.
2. **Developing decentralized applications (DApps)**: Applications that operate without a central intermediary.
3. **Managing smart contracts**: such as buying and selling contracts, lending, and insurance.
4. **Decentralized Finance (DeFi)**: Creating services such as lending and trading using smart contracts.
### **A simple example of a smart contract in Solidity**:
```solidity