C Program to use identifier for 3.14 as PI and Program to find the area of circle

#include”stdio.h”
#include”conio.h”
#define PI 3.14
void main()
{
float r, area;
clrscr();
printf(“\n Enter radius of the circle in cm:”);
scanf(“%f”,&r);
area=PI*r*r;
printf(“area of the circle = %.2f cm^2”,area);
getch();
}

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