Q3. Write a C program to find the area and Circumference of a circle.

C program to find the area of a circle:-
 #include<stdio.h>
 #include<conio.h>

 #define PI 3.1416

 void main()
 {
  float a, r, c;
  clrscr();
  printf("Enter Radious=");
  scaf("%f",&r);

  a=PI*r*r;
  c=2*PI*r;
  printf("Area=%f \n Circumference=%f", a, c);
  getch();
 }
 
Note:-
Here,
a for Area,
r for radious and 
C for circumference. 

write a c program that print the area of a circle and circumference, 

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