Area of circle and circumference

Area of circle and circumference of circle in c :

code

  #include<stdio.h>
  #include<conio.h>
   void main()
{
   int rad;
   float pi = 3.14, area, ci;
  clrscr();
   printf(“\nEnter radius of circle: “);
   scanf(“%d”, &rad);
   area = pi * rad * rad;
   printf(“\nArea of circle : %f “, area);
   ci = 2 * pi * rad;
   printf(“\nCircumference of circle : %f “, ci);
   getch();
}

output

Enter radius of circle : 20
Area of circle :1256
Circumference of circle :125.6
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