# C Program To Calculate Area and Circumference of Circle

This C program accepts the radius of Circle from user and calculates the area and circumference of circle.

Area of Circle:Formula to Find Area of Circle = π * r^{2}Circumference of Circle:Formula to Find Circumference of Circle = 2 * π * r where r is the radius of circle and π is a mathematical constant that is the ratio of a circle's circumference to its diameter, and is approximately equal to 3.14159.

## C Program to Calculate Area and Circumference of a Circle

```
/* C code to calculate the area and circumference of a circle */
#include<stdio.h>
int main()
{
float area, circumference, radius;
printf("\n \n Enter the Radius of Circle: ");
scanf("%f",&radius);
area = 3.14 * radius * radius;
c=2*3.14*r;
printf("\n Area of Circle is %.2f \n", area);
printf("\n \n The Circumference of Circle is %.2f \n", circumference);
return 0;
}
```

### Output:

Enter the Radius of Circle: 4 Area of Circle is 50.24 The Circumference is 25.12