C/C++ » C Program

# Table of Content

## C Program to find area and circumference of circle

 123456789101112131415161718 #include int main() {   int rad;  float PI = 3.14, area, ci;   printf("\nEnter radius of circle: ");  scanf("%d", &rad);   area = PI * rad * rad;  printf("\nArea of circle : %f ", area);   ci = 2 * PI * rad;  printf("\nCircumference : %f ", ci);   return (0);}

## Output :

 123 Enter radius of a circle : 1Area of circle : 3.14Circumference : 6.28

## Explanation of Program :

In this program we have to calculate the area and circumference of the circle. We have following 2 formulas for finding circumference and area of circle.

 1 Area of Circle = PI * R * R

and

 1 Circumference of Circle = 2 * PI * R

In the above program we have declared the floating point variable PI whose value is defaulted to 3.14.We are accepting the radius from user.

# Table of Content

## C Program to Calculate Area and Circumference of circle

2014-08-02T18:35:43+00:00

## C Program to find area and circumference of circle

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#include<stdio.h>

 int rad;  float PI = 3.14, area, ci;
printf("\nArea of circle : %f ", area);
ci = 2 * PI * rad;
printf("\nCircumference : %f ", ci);
return (0);}

## Output :

 123 Enter radius of a circle : 1Area of circle : 3.14Circumference : 6.28

## Explanation of Program :

In this program we have to calculate the area and circumference of the circle. We have following 2 formulas for finding circumference and area of circle.

 1 Area of Circle = PI * R * R

and

 1 Circumference of Circle = 2 * PI * R

In the above program we have declared the floating point variable PI whose value is defaulted to 3.14.We are accepting the radius from user.