In this article, we will learn a C++ program to find the area of the circle. This program takes a radius from the user and shows the area of the circle on the console screen.
Formula
We can calculate the area of the circle by using the formula A = π r2
where π value is 3.14159
Example: Area of the circle in C++
#include <iostream>
using namespace std;
int main()
{
float area, radius;
cout << "Enter the radius of a circle : ";
cin >> radius;
area = 3.14 * radius * radius;
cout << "Area of circle will be: "<< area;
return 0;
}Output
