C Function Arguments and Return Value

A function can take values (arguments) and can give a value back (return value). Based on this there are four types of functions.

Type	Arguments	Return value
1	No	No
2	Yes	No
3	No	Yes
4	Yes	Yes

#include <stdio.h>

void hello(void) {                 // no argument, no return
    printf("Hello\n");
}

void showSquare(int n) {           // argument, no return
    printf("Square = %d\n", n * n);
}

int readFive(void) {               // no argument, return
    return 5;
}

int multiply(int a, int b) {       // argument and return
    return a * b;
}

int main(void) {
    hello();
    showSquare(4);
    printf("%d\n", readFive());
    printf("%d\n", multiply(6, 7));
    return 0;
}

Output:

Terms to know

• Parameters are the variables in the function definition (int a, int b).
• Arguments are the real values you pass when calling (multiply(6, 7)).
• A function can return only one value with return. To get more values you can use pointers or a structure.
• After return executes, the function ends at once.

Next: C Call by Value and Call by Reference.

• Previous Page
• Next Page

---

Exercises & Assignments
No Content Found.

Interview Questions & Answers
No Content Found.