Description: The function argument is a value passed to a function when it is invoked. This concept is fundamental in programming, as it allows functions to receive external data and operate on it, facilitating code reuse and modularity. Arguments can be of different types, such as numbers, strings, lists, objects, among others, depending on the programming language used. In many programming languages, such as TypeScript, PHP, and Python, arguments can be optional or required, and their handling may include defining default values. Additionally, some languages allow the use of variable-length arguments, providing greater flexibility when defining functions. Proper management of arguments is crucial for the correct functioning of functions, as poorly passed arguments can result in execution errors or unexpected behaviors. In summary, the function argument is an essential component that allows interaction between functions and data, making it possible to create more dynamic and efficient programs.