Program to find area of a circle
Area of a circle can simply be evaluated using following formula.
Area = pi * r2 where r is radius of circle
C++
// C++ program to find area // of circle #include <iostream> const double pi = 3.14159265358979323846; using namespace std; // function to calculate the area of circle float findArea(float r) { return (pi * r * r); } // driver code int main() { float r, Area; r = 5; // function calling Area = findArea(r); // displaying the area cout << "Area of Circle is :" << Area; return 0; } |
chevron_right
filter_none
C
// C program to find area // of circle #include <stdio.h> #include <math.h> #define PI 3.142 double findArea(int r) { return PI * pow(r, 2); } int main() { printf("Area is %f", findArea(5)); return 0; } |
chevron_right
filter_none
Java
// Java program to find area // of circle class Test { static final double PI = Math.PI; static double findArea(int r) { return PI * Math.pow(r, 2); } // Driver method public static void main(String[] args) { System.out.println("Area is " + findArea(5)); } } |
chevron_right
filter_none
Python3
# Python3 program to find Area of a circle def findArea(r): PI = 3.142 return PI * (r*r); # Driver method print("Area is %.6f" % findArea(5)); # This code is contributed by Chinmoy Lenka |
chevron_right
filter_none
C#
// C# program to find area of circle using System; class GFG { static double PI = Math.PI; static double findArea(int r) { return PI * Math.Pow(r, 2); } // Driver method static void Main() { Console.Write("Area is " + findArea(5)); } } // This code is contributed by Sam007. |
chevron_right
filter_none
PHP
<?php // PHP program to find area // of circle function findArea( $r) { $PI =3.142; return $PI * pow($r, 2); } // Driver Code echo("Area is "); echo(findArea(5)); return 0; // This code is contributed by vt_m. ?> |
chevron_right
filter_none
Output:
Area is 78.550000
Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.
