Program to find Circumference of a Circle
Given radius of a circle, write a program to find its circumference.
Examples :
Input : 2 Output : Circumference = 12.566 Input : 8 Output : Circumference = 50.264
In a circle, points lie in the boundary of a circle are at same distance from its center. This distance is called radius. Circumference of a circle can simply be evaluated using following formula.
Circumference = 2*pi*r where r is the radius of circle and value of pi = 3.1415.
C++
// CPP program to find circumference of circle #include<bits/stdc++.h> using namespace std; #define PI 3.1415 double circumference( double r) { double cir = 2*PI*r; return cir; } // driver function int main() { double r = 5; cout << "Circumference = " << circumference(r); return 0; } |
Java
// Java program to find circumference of circle import java.io.*; class Geometry { // utility function static double circumference( double r){ double PI = 3.1415 ; double cir = 2 *PI*r; return cir; } // driver function public static void main (String[] args) { double r = 5 ; double result = Math.round(circumference(r) * 1000 ) / 1000.0 ; System.out.println( "Circumference = " + result); } } // This article is contributed by Chinmoy Lenka |
Python3
# Python3 code to find # circumference of circle PI = 3.1415 # utility function def circumference(r): return ( 2 * PI * r) # driver function print ( '%.3f' % circumference( 5 )) # This code is contributed by Saloni Gupta |
C#
// C# program to find circumference of circle using System; class GFG { // utility function static double circumference( double r){ double PI = 3.1415; double cir = 2*PI*r; return cir; } // driver function public static void Main () { double r = 5; double result = Math.Round(circumference(r) * 1000) / 1000.0; Console.WriteLine( "Circumference = " + result); } } // |
PHP
<?php // PHP program to find // circumference of circle $PI = 3.1415; function circumference( $r ) { global $PI ; $cir = 2 * $PI * $r ; return $cir ; } // Driver Code $r = 5; echo "Circumference = " , circumference( $r ); // This code is contributed aj_36 ?> |
Javascript
<script> // Javascript program to find circumference of circle function circumference(r) { let cir = 2*3.1415*r; return cir; } // driver function let r = 5; document.write( "Circumference = " + circumference(r)); //This code is contributed by Manoj </script> |
Output :
Circumference = 31.415
Time Complexity: O(1), since there is no loop or recursion.
Auxiliary Space: O(1), since no extra space has been taken.
This article is contributed by Saloni Gupta .
Contact Us