Thread: C code for area of circle

Hi. I am new in c programming language. I want to right C code for area of circle. Please give me the proper codes it is highly appreciated.

Try this, it will helpful for you.

Code:

#include <stdio.h> 
#define PI 3.14159

int main()
{
float area , radius ;
printf("Enter the radius of the circle.n");
scanf("%f",&radius);
area = PI * radius * radius;
printf("The area of a circle is %f.n",area);
return 0;
}

Try out this code, when you run this program you get the area of circle as an output result:

Code:

#include<stdio.h>
#include<conio.h>
main() 
{ 
int r; 
float a; 
print f ("Enter r value n"); 
scan f ("%d", &r); 
a=3.14*r*r; 
print f("area=%f",a); 
}