In C, function parameters are used to pass data to a function. They're like placeholders for actual values (called arguments) that you provide when calling the function. ????

? Basic Syntax

c
return_type (type1 param1, type2 param2);

Example:

c
int add(int a, #include // Function declarationvoid greetUser(char name[]);() {    greetUser("Alice");  // Passing argument    return 0;}// Function definitionvoid greetUser(char name[]) {    void change(int x) {    x = () {    int num = 50;    change(num);    printf("%d\n", num); // Output: 50}

Use Pointers for Pass-by-reference:

c
void change(int *x) {    *x = () {    int num = 50;    change(&num);    printf("%d\n", num); // Output: 100}

? Multiple Parameters Example

c
float area(float width, float height) {    return width * height;}

Call with:

c
float result = area(5.0, 3.5);

? Summary

• Function parameters are variables listed in the function's definition.

• Arguments are the actual values passed during the call.

• C uses pass-by-value by default.

• Use pointers to simulate pass-by-reference when needed.