Description: Invocation in programming refers to the act of calling a function or method to execute its block of code. This process is fundamental in programming as it allows for code reuse and modularity, facilitating the organization and maintenance of applications. When a function is invoked, arguments can be passed that the function will use to perform its task. Invocation can be direct, where the function is called from the same context, or indirect, where a pointer or reference to the function is used. Additionally, invocation can be synchronous, where the program waits for the function to finish executing before continuing, or asynchronous, where the program continues running while the function executes in the background. This concept is key in various programming paradigms, including procedural programming and object-oriented programming, where methods of a class are invoked to manipulate the data of objects. Invocation is also found in the context of web services, where APIs can be invoked through HTTP requests to retrieve or send data. In summary, invocation is a central concept in programming that allows for structured and efficient code execution.
