A virtual function is a concept that allows for the implementation of dynamic method resolution in software programming. In the context of smart contracts and blockchain implementations, a virtual function refers to a function that can be overridden by derived contracts.When a smart contract calls a virtual function, it can determine which derived contract’s version of the function to execute at runtime. This allows developers to create more flexible and extensible systems by enabling contracts to inherit properties and behaviors from one another.For instance, consider a base contract that defines a virtual function for calculating a token’s value. Various derived contracts can override this function to implement specific rules or calculations. This feature promotes code reuse and simplifies the management of complex systems by ensuring that new functionalities can be added without altering existing codebases extensively.Overall, virtual functions enhance modularity and adaptability in smart contract development, facilitating better updates and integrations over time.