Write a Program to calculate the Surface Area of Hemisphere

Program of calculating the surface area of a hemisphere in different Programming languages

Program 1: Write a Program in C language:

// This is a C program which uses a function to calculate the surface area of a hemisphere.  
#include <stdio.h>  
  
float find_SurfaceArea_of_hemisphere(float r) // It is a function to find surface area   
{   
    float pi=3.14;  
    float SurfaceArea_of_hemisphere;  
    SurfaceArea_of_hemisphere=( 2 * pi * r * r ) ; // It is a formula for calculating a surface area of hemisphere   
    return (SurfaceArea_of_hemisphere);   
}   
float main()   
{   
float r;   
printf("Enter the radius of the hemisphere:");   
scanf("%f",&r);  
printf("Surface Area of the hemisphere is: %f", find_SurfaceArea_of_hemisphere(r));     
return 0;   
}  

Output of Above C program:

Enter the radius of the hemisphere:10
Surface Area of the hemisphere is: 628.000000

Program 2: Write a Program in Java language:

// This a  Java program which calculates the surface area of a hemisphere.  
import java.util.*;  
import java.lang.*;  
class findsurface_area {   
static double find_SurfaceArea_of_hemisphere(float r)   
{   
double SurfaceArea_of_hemisphere;  
SurfaceArea_of_hemisphere= ( 2 * 3.14 * Math.pow ( r, 2 ) ); // It is a formula for calculating the surface area of hemisphere   
return(SurfaceArea_of_hemisphere);   
}   
  
// Driver method   
public static void main(String[] args)   
{   
float radius = 10;   
System.out.println("The Surface Area of a hemisphere in Java:");  
System.out.println(find_SurfaceArea_of_hemisphere(radius));   
}   
}  

Output of Above Java program:

The Surface Area of a hemisphere in Java:
628.0

Program 3: Write a Program in PHP programming language.

<?php   
// This a  PHP program which calculates the surface area of a hemisphere.    
// Function to find surface area   
function find_SurfaceArea_of_hemisphere($r)   
{     
$pi =  3.141592653589793;  
$SurfaceArea_of_hemisphere = ( 2 * 3.14 * $r * $r ); // It is a formula which calculates the surface area  and store the value in the Surface Area_of_hemisphere variable.   
return ($SurfaceArea_of_hemisphere);   
}   
$radius = 10;   
echo find_SurfaceArea_of_hemisphere($radius);   
  
?>  

Output of Above PHP program:

628

Program 4: Write a Program in Python programming language.

# This is a python program which calculates the surface area of a hemisphere.   
# It is a function to calculate the surface area of hemisphere  
def find_SurfaceArea_of_hemisphere(radius):  
    return ( ( 2 * 3.14 * ( radius * radius ) ) ) # It is a formula which calculates the value of Surface Area.   
  
radius =10  
print(find_SurfaceArea_of_hemisphere(radius))  

Output of Above Python program:

628.0