Circumference Of Circle C Example Program
Definition
When a circle's diameter is 1, its circumference is π. When a circle's radius is 1—called a unit circle—its circumference is 2π.
Formula
The circumference of a circle is written
π = C / d
Or, equivalently, as the ratio of the circumference to twice the radius. The above formula can be rearranged to solve for the circumference:
C = π * d = 2π * r
here,
r = Radius π = ~3.14
Circumference Of Circle Example Program
/*##Circumference Of Circle*/
/*##Calculation Programs, Datatype Programs, Basic Programs*/
#include<stdio.h>
float PI = 3.14;
int main(){
float radius, ci;
printf("\nEnter the radius of Circle : ");
scanf("%f", &radius);
ci = 2 * PI * radius;
printf("\nCircumference of Circle : %f", ci);
return (0);
}
Sample Output
Enter the radius of Circle : 2
Circumference of Circle : 12.560000
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