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C program to calculate area of a circle using function.

C program to calculate area of a circle.


In this example we will learn to calculate the area of a circle. Here in this program we will use 3.14 as the value of pi. 

  • The formula to calculate the area of a circle is:

                                            area= π r²


Flowchart To Calculate the Area of a Circle:

Flowchart To Calculate the Area of a Circle:


PROGRAM:

#include<conio.h>
#include<stdio.h>
int main()
{
    float radius,area;
    printf("Enter the radius of the circle : ");
    scanf("%f",&radius);
    area=3.14*radius*radius;    
    printf("Area of the circle is : %.2f",area);
    return 0;
}


OUTPUT:




C program to calculate area of a circle using function.

        Here, we will learn how to calculate the area of a circle using function.


Program:

#include<conio.h>
#include<stdio.h>
float circle(float);
int main()
{
    float radius,area;
    printf("Enter the radius of the circle : ");
    scanf("%f",&radius);
    circle(radius);
    return 0;
}
float circle(float r)
{
    float area;
    area=3.14*r*r;    
    printf("Area of the circle is : %.2f\",area);
}



Output:

    
            
NOTE:                        
        You Can post your code in our comment section. Your comment will be approved if your code is different from the code posted above. Thank You.

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