Program to print the diamond shape

1

Given a number n, write a C program to print a diamond shape with 2n rows.

Examples:
diamond

C/C++

// C program to print diamond shape with 2n rows
#include<stdio.h>

// Prints diamond pattern with 2n rows
void printDiamond(int n)
{
    int space = n-1;

    // run loop (parent loop) till number of rows
    for (int i=0; i<n; i++)
    {
        // loop for initially space, before
        // star printing
        for (int j=0;j< space;j++)
            printf(" ");

        // Print i+1 stars
        for (int j=0;j<=i;j++)
            printf("* ");

        printf("\n");
        space--;
    }

    // Repeat again in reverse order
    space = 0;

    // run loop (parent loop) till number of rows
    for (int i=n; i>0; i--)
    {
        // loop for initially space, before
        // star printing
        for (int j=0; j<space; j++)
            printf(" ");

        // Print i stars
        for (int j=0;j< i;j++)
            printf("* ");

        printf("\n");
        space++;
    }
}

// Driver code
int main()
{
    printDiamond(5);
    return 0;
}

Java

// JAVA Code to print the diamond shape
import java.util.*;

class GFG {
    
    // Prints diamond pattern with 2n rows
    static void printDiamond(int n)
    {
        int space = n - 1;
     
        // run loop (parent loop) till number
        // of rows
        for (int i = 0; i < n; i++)
        {
            // loop for initially space, before
            // star printing
            for (int j = 0; j < space; j++)
                System.out.print(" ");
     
            // Print i+1 stars
            for (int j = 0; j <= i; j++)
                System.out.print("* ");
     
            System.out.print("\n");
            space--;
        }
     
        // Repeat again in reverse order
        space = 0;
     
        // run loop (parent loop) till number
        // of rows
        for (int i = n; i > 0; i--)
        {
            // loop for initially space, before
            // star printing
            for (int j = 0; j < space; j++)
                System.out.print(" ");
     
            // Print i stars
            for (int j = 0; j < i; j++)
                System.out.print("* ");
     
            System.out.print("\n");
            space++;
        }
    }
    
    /* Driver program to test above function */
    public static void main(String[] args) 
    {
        printDiamond(5);
        
    }
}

// This code is contributed by Arnav Kr. Mandal.    

Python

# Python program to print Diamond shape

# Function to print Diamond shape
def Diamond(rows):
    n = 0
    for i in range(1, rows+1):
        # loop to print spaces
        for j in range (1, (rows-i)+1):
            print(end=" ")
        
        # loop to print star
        while n != (2*i-1):
            print("*", end="")
            n = n+1
        n = 0
        
        # line break
        print() 

    k = 1
    n = 1
    for i in range(1, rows):
        # loop to print spaces
        for j in range (1, k+1):
            print(end=" ")
        k = k+1
        
        # loop to print star
        while n <= (2*(rows-i)-1):
            print("*", end="")
            n = n+1
        n = 1
        print()

# Driver program
# number of rows input
rows = 5
Diamond(rows)


Output:


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

This article is contributed by Rahul Singh(Nit KKR). If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

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