C Language
#include<stdio.h> #include<conio.h> void main() { float r,a,c; clrscr(); printf("Enter radius"); scanf("%f",&r) a=3.14*r*r; c=2*3.14*r; printf("Area=%f\n",a); printf("Circumference = %f",c); getch(); } /*OUTPUT*/ Enter radius 2.0 Area= 12.560000 Circumference = 12.560000