In C programming, function arguments (also known as parameters) are the values passed to a function when it is called. They are used to provide input data to the function, which the function can then use to perform its intended operation.
Function arguments are declared in the function prototype and must match the data types of the actual arguments passed in the function call. For example:
int add(int x, int y);
In this example, the function
add takes two arguments,
y, both type
int. When the function is called, the values passed as arguments will be assigned to the variables
y inside the function.
Function arguments can be passed in several different ways in C, including by value, by reference, and by the pointer. The method used to pass arguments can affect the behavior of the function and the scope of the arguments within the function.
For example, when arguments are passed by value, the function operates on a copy of the argument rather than the original. When arguments are passed by reference, the function operates on the original argument, and any changes made to the argument within the function will persist after the function call. When arguments are passed by a pointer, the function operates on the memory location pointed to by the argument.
Overall, function arguments are an important aspect of C programming and can be used to provide input data and control the behavior of a function. Understanding how to use function arguments effectively can help you to write more flexible and reusable code.