using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; names

Question

If anyone has know this question then tell me

Answer 1

What is the question?

Answer 2

Aryan Maurya Mr.perfect please show us your attempt

and follow the 8 rules for getting help.

https://www.sololearn.com/blog/38/8-simple-rules-to-get-help-from-the-community

Answer 3

Aryan Maurya Mr.perfect

Area of circle

pi * r * r;

pi is given
Take r as input

Answer 4

We are going to write a program that will calculate the area of ​​a circle.
The area enclosed by a circle of radius r is πr², where π (pi) is the constant ratio of the circumference of any circle to its diameter, and r is the radius.
The given program declares a constant pi variable with a value of 3.14.
Complete the program to take the radius as input, then calculate and output the area of the circle.

Sample Input
5

Sample Output
78.5