5. Write a C program to enter radius of a circle and find its diameter, circumference and area. Solution :- #include<conio.h> #include<stdio.h> void main() { clrscr(); float radius,area,circumference,diameter,pi=3.14; printf("Enter the radius :-"); scanf("%f",&radius); area =pi*radius*radius; diameter = 2*radius; circumference =2*pi*radius; printf("The area of a circle :-%f\n",area); printf("The diameter of a Circle :-%f\n",diameter); printf("The Circumference of a Circle :- %f\n",circumference); getch(); } Output :-
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