Program to calculate Volume and Surface area of Hemisphere

Calculate volume and surface area of a hemisphere. 
Hemisphere : 
In geometry, it is an exact half of a sphere. We can find many of the real life examples of the hemispheres such as our planet Earth can be divided into two hemisphere the southern & northern hemispheres. 

Volume of Hemisphere : Volume of a Hemisphere is nothing but the amount of space occupied by the hemisphere. It is also defined as the quantity of three dimensional space enclosed by the boundary of the Hemisphere.
Surface area : The number of square units that will exactly cover the surface of a hemisphere. 
surface area = 
volume = 

Examples : 

Input :  Radius = 7
Output : 
Volume = 718.378
Surface Area = 307.876

Input :  Radius = 11
Output : 
Volume = 2787.64
Surface Area = 760.265

C++

// CPP Program to calculate volume and
// and surface area of a Hemisphere.
#include <bits/stdc++.h>
using namespace std;
// Initializing value of pi
#define pi 3.141592653589793

// Function to calculate volume
void volume(float r)
{
    float volume = float(2 * pi * pow(r, 3)) / float(3);
    cout << "Volume = " << volume << endl;
}
// Function to calculate surface area
void surface_area(float r)
{
    float s_area = 2 * pi * pow(r, 2);
    cout << "Surface Area = " << s_area << endl;
}

// Driver program
int main()
{
    float r = 11;
    volume(r);
    surface_area(r);
    return 0;
}

Java

// Java Program to calculate volume and
// and surface area of a Hemisphere.
import java.util.*;
import java.lang.*;

public class GfG{

    // Initializing value of pi
    private static final float pi = (float) 3.141592653589793;

    // Function to calculate volume
    public static void volume(float r)
    {
        float volume = (float)(2 * pi *(float) Math.pow(r, 3))
                                                    / (float)(3);
        System.out.println("Volume = " + volume);
    }
    // Function to calculate surface area
    public static void surface_area(float r)
    {
        float s_area = (float)2 * pi * (float)Math.pow(r, 2);
        System.out.println("Surface Area = " + s_area);
    }

    // Driver function
    public static void main(String argc[]){
        float r = 11;
        volume(r);
        surface_area(r);
    }

}
/* This code is contributed by Sagar Shukla */

Python

# Python code Program to calculate volume and
# and surface area of a Hemisphere.
import math

# Function to calculate volume
def volume(r):
    volume = 2 * math.pi * math.pow(r, 3) / 3
    print("Volume = ", '%.4f' %volume)

# Function to calculate surface area
def surface_area(r):
    s_area = 2 * math.pi * math.pow(r, 2)
    print("Surface Area = ", '%.4f' %s_area)

# Driver code
r = 11
volume(r)
surface_area(r)

C#

// C# Program to calculate volume and
// and surface area of a Hemisphere.
using System;

public class GfG{

    // Initializing value of pi
    private static float pi = (float) 3.141592653589793;

    // Function to calculate volume
    public static void volume(float r)
    {
        float volume = (float)(2 * pi *(float) Math.Pow(r, 3))
                                                / (float)(3);
        Console.WriteLine("Volume = " + volume);
    }

    // Function to calculate surface area
    public static void surface_area(float r)
    {
        float s_area = (float)2 * pi * (float)Math.Pow(r, 2);
        Console.WriteLine("Surface Area = " + s_area);
    }

    // Driver function
    public static void Main()
    {
        float r = 11;
        volume(r);
        surface_area(r);
    }

}

/* This code is contributed by vt_m */

PHP

<?php
// PHP Program to calculate volume and
// and surface area of a Hemisphere.

// Initializing value of pi &
// Function to calculate volume
function volume($r)
{
    $pi =3.141592653589793;
    $volume = (2 * $pi *
               pow($r, 3)) /(3);
    echo("Volume = " );
    echo($volume);
    echo("\n");
}

// Function to calculate
// surface area
function surface_area($r)
{
    $pi = 3.141592653589793;
    $s_area = 2 * $pi * pow($r, 2);
    echo( "Surface Area = ");
    echo($s_area) ;
}

// Driver code
$r = 11;
volume($r);
surface_area($r);

// This code is contributed by vt_m
?>

Javascript

<script>
// javascript Program to calculate volume and
// and surface area of a Hemisphere.

// Initializing value of pi
const pi = 3.141592653589793;

// Function to calculate volume
function volume(r)
{
    let volume = (2 * pi * Math.pow(r, 3)) / (3);
     document.write("Volume = " + volume.toFixed(2)+ "<br/>");
}

// Function to calculate surface area
function surface_area(r)
{
    let s_area = 2 * pi * Math.pow(r, 2);
     document.write("Surface Area = " + s_area.toFixed(3) +"<br/>");
}

// Driver program
   let r = 11;
    volume(r);
    surface_area(r);

// This code is contributed by aashish1995

</script>

Output

Volume = 2787.64
Surface Area = 760.265

Time complexity: O(1), as calculating square and cube using pow function takes constant operations.
Auxiliary space: O(1)