A non-callable function is a specific type of function in smart contracts that cannot be initiated or invoked by users after its initial deployment. Once the function is set, it remains immutable, ensuring that its behavior and outputs are predictable and secure.This feature enhances security by preventing any unauthorized access or unwanted modifications. As a result, users can interact with the contract with confidence, knowing that certain key operations will consistently behave as intended.In practical terms, non-callable functions often handle critical components like burning tokens, distributing rewards, or finalizing transactions. By restricting who can execute these functions, developers can mitigate risks associated with contract vulnerabilities and user manipulation.Ultimately, the use of non-callable functions contributes to the overall integrity and reliability of smart contracts, helping to foster trust among participants in the ecosystem.