How many ways are there to pass parameters in the C language?

There are several ways to pass parameters in the C language.

1. Pass by value: copying the value of the parameter to the formal parameter, modifications to the formal parameter within the function will not affect the value of the actual parameter.
2. Pass by reference: By passing the address of a parameter, allowing the function to directly access and modify the value of the argument.
3. Pass by pointer: passing the pointer of a parameter as the formal parameter to a function, allowing the function to access and modify the value of the actual parameter indirectly through the pointer.
4. Passing arrays: Passing an array as a parameter to a function allows the function to directly access and modify the values of the array elements.
5. Passing structures: Sending a structure as a parameter to a function allows the function to access and modify the values of the structure members directly.

It is important to note that in the C language, parameters are passed by value, meaning modifications to formal parameters within a function will not affect the values of actual parameters unless passed by reference or through pointers.