Program to print circle pattern

Given a positive integer n i.e, radius of the circle, print a circle using stars.

Examples : 

Input : n = 3
Output :
  ***  
 *   * 
*     *
*     *
*     *
 *   * 
  ***

Input : n = 6
Output :
    *****    
  **     **  
 **       ** 
 *         * 
*           *
*           *
*           *
*           *
*           *
 *         * 
 **       ** 
  **     **  
    *****

CPP

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// C++ implementation to print circle pattern
#include <bits/stdc++.h>
using namespace std;
  
// function to print circle pattern
void printPattern(int radius) {
  
  // dist represents distance to the center
  float dist;
  
  // for horizontal movement
  for (int i = 0; i <= 2 * radius; i++) {
  
    // for vertical movement
    for (int j = 0; j <= 2 * radius; j++) {
      dist = sqrt((i - radius) * (i - radius) + 
                  (j - radius) * (j - radius));
  
      // dist should be in the range (radius - 0.5)
      // and (radius + 0.5) to print stars(*)
      if (dist > radius - 0.5 && dist < radius + 0.5) 
        cout << "*";
      else 
        cout << " ";      
    }
  
    cout << "\n";
  }
}
  
// Driver Code
int main() {
  int radius = 6;
  printPattern(radius);
  return 0;
}

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Java














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// Java implementation to print circle pattern 


  


class GFG { 


      


// function to print circle pattern 


static void printPattern(int radius) { 


  


    // dist represents distance to the center 


    double dist; 


  


    // for horizontal movement 


    for (int i = 0; i <= 2 * radius; i++) { 


  


    // for vertical movement 


    for (int j = 0; j <= 2 * radius; j++) { 


        dist = Math.sqrt((i - radius) * (i - radius) + 


                         (j - radius) * (j - radius)); 


  


        // dist should be in the range (radius - 0.5) 


        // and (radius + 0.5) to print stars(*) 


        if (dist > radius - 0.5 && dist < radius + 0.5) 


        System.out.print("*"); 


        else


        System.out.print(" "); 


    } 


  


    System.out.print("\n"); 


    } 


} 


  


// Driver code 


public static void main(String[] args)  


{ 


    int radius = 6; 


    printPattern(radius); 


} 


} 


  


// This code is contributed by Anant Agarwal. 



















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Python3














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# Python implementation 


# to print circle pattern 


  


import math 


  


# function to print circle pattern 


def printPattern(radius): 


      


    # dist represents distance to the center 


    # for horizontal movement 


    for i in range((2 * radius)+1): 


   


        # for vertical movement 


        for j in range((2 * radius)+1): 


              


            dist = math.sqrt((i - radius) * (i - radius) + 


                  (j - radius) * (j - radius)) 


   


            # dist should be in the 


            # range (radius - 0.5) 


            # and (radius + 0.5) to print stars(*) 


            if (dist > radius - 0.5 and dist < radius + 0.5):  


                print("*",end="") 


            else: 


                print(" ",end="")       


      


   


        print() 


    


# Driver code 


  


radius = 6


printPattern(radius) 


  


# This code is contributed 


# by Anant Agarwal. 



















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C#














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// C# implementation to print circle pattern 


using System; 


  


class GFG { 


      


    // function to print circle pattern 


    static void printPattern(int radius) { 


      


        // dist represents distance to the center 


        double dist; 


      


        // for horizontal movement 


        for (int i = 0; i <= 2 * radius; i++) { 


      


            // for vertical movement 


            for (int j = 0; j <= 2 * radius; j++) { 


                dist = Math.Sqrt((i - radius) *  


                        (i - radius) + (j - radius)  


                                    * (j - radius)); 


          


                // dist should be in the range  


                // (radius - 0.5) and (radius + 0.5)  


                // to print stars(*) 


                if (dist > radius - 0.5 &&  


                               dist < radius + 0.5) 


                    Console.Write("*"); 


                else


                    Console.Write(" "); 


            } 


          


            Console.WriteLine(""); 


        } 


    } 


      


    // Driver code 


    public static void Main()  


    { 


        int radius = 6; 


          


        printPattern(radius); 


    } 


} 


  


// This code is contributed by vt_m. 



















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PHP














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<?php 


// PHP implementation to print  


// circle pattern 


  


// Function to print circle pattern 


function printPattern($radius)  


    { 


      


    // dist represents distance 


    // to the center 


    $dist = 0.0; 


      


    // for horizontal movement 


    for ($i = 0; $i <= 2 * $radius; $i++)  


    { 


      


        // for vertical movement 


        for ($j = 0; $j <= 2 * $radius; $j++)  


        { 


            $dist = sqrt(($i - $radius) *  


                         ($i - $radius) +  


                         ($j - $radius) *  


                         ($j - $radius)); 


          


            // dist should be in the range  


            // (radius - 0.5) and (radius + 0.5)  


            // to print stars(*) 


            if ($dist > $radius - 0.5 &&  


                 $dist < $radius + 0.5)  


                echo "*"; 


                  


            else


                echo " ";  


        } 


        echo "\n"; 


    } 


} 


  


// Driver Code 


$radius = 6; 


printPattern($radius); 


  


// This code is contributed by Mithun Kumar 


?> 



















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Output :


    *****    
  **     **  
 **       ** 
 *         * 
*           *
*           *
*           *
*           *
*           *
 *         * 
 **       ** 
  **     **  
    *****  








    

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