🔹 Building Modular and Maintainable Code
OOP principles in Solidity promote modularity, which is essential when building complex dApps. By organizing code into reusable contracts and libraries, developers can build on existing components without introducing redundancy. Libraries in Solidity, for instance, allow the reuse of common functionality across multiple contracts.

solidity

library Math {
    function add(uint a, uint b) internal pure returns (uint) {
        return a + b;
    }
}

contract Calculator {
    using Math for uint;

    function calculateSum(uint a, uint b) public pure returns (uint) {
        return a.add(b);
    }
}