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C program to find area of a Circle

The formula to calculate area of Circle is pi * radius * radius, where the value is pi is 3.14. In this program user is asked to enter radius and the output is the area of circle.

#include<stdio.h>
#define PI 3.14

int main ()
{
float radius, area;

printf("Enter the radius of circle := ");
scanf("%f",&radius);

area=PI*radius*radius;
printf("Area of the circle with radius %f is = %f", radius, area);

return 0;
}

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