Description: Function invocation is the process of calling a function to execute its code. This concept is fundamental in programming as it allows developers to structure their code into reusable and modular blocks. When invoking a function, information can be passed through parameters, enabling the function to perform specific operations based on that data. Function invocation can be direct, where the function is called explicitly, or indirect, where a pointer or reference to the function is used. This mechanism not only improves code readability but also facilitates debugging and maintenance, as changes in one function do not directly affect the rest of the code that invokes it. In the context of cloud computing and serverless architectures, function invocation becomes a key component for executing code in response to events, allowing developers to build scalable and efficient applications without worrying about the underlying infrastructure. Therefore, function invocation is a central concept in modern programming and in microservices-based software architecture.