lecture-23.md

Lecture-23 Types of Functions Based on Arguments and Returntype in C Programming

Function argument and return values

There are following categories:

• Function with arguments and return value.
• Function with arguments but no return value.
• Function with no arguments but returns a value.
• Function with no argument and no return value.
  

Function with arguments and return value

💻Example 1 :

WAP to calculate area of rectangle

#include <stdio.h>

int cal_area(int l, int b)
{
    int area = l * b;
    
    return area;
}
int main() {
    
    int l, b, area;
    
    printf("Enter length & breadth: ");
    scanf("%d%d",&l, &b);
    
    area = cal_area(l, b);
    
    printf("Area: %d",area);
    
    return 0;
}

⚙️ Output :

Enter length & breadth: 10 5
Area: 50

Function with arguments but no return value.

💻Example 2 :

#include <stdio.h>

void cal_area(int l, int b)
{
    int area = l * b;
    
    printf("Area: %d",area);
    
}
int main() {
    
    int l, b;
    
    printf("Enter length & breadth: ");
    scanf("%d%d",&l, &b);
    
    cal_area(l, b);
    
    return 0;
}

⚙️ Output :

Enter length & breadth: 10 5
Area: 50

Function with no arguments but returns a value.

💻Example 3 :

#include <stdio.h>

int cal_area()
{
    int l, b;
    
    printf("Enter length & breadth: ");
    scanf("%d%d",&l, &b);
    
    int area = l * b;
    
    return area;
}

int main() {
    
    int area = cal_area();
    
    printf("Area: %d", area);
    
    return 0;
}

⚙️ Output :

Enter length & breadth: 10 5
Area: 50

Function with no argument and no return value.

💻Example 4 :

#include <stdio.h>

void cal_area()
{
    int l, b;
    
    printf("Enter length & breadth: ");
    scanf("%d%d",&l, &b);
    
    int area = l * b;
    
    printf("Area: %d", area);
}

int main() {
    
    cal_area();
    
    return 0;
}

⚙️ Output :

Enter length & breadth: 10 5
Area: 50

🏠Homework

WAP to calculate simple interest using all 4 types of functions.

🔗 Some Useful Links

📖 References