DSA/diamondPattern.java at main · Developer-SAIF/DSA · GitHub

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/*
# create a diamond pattern from user input
*/

import java.util.Scanner;

public class Main
{
    public static void diamond (int length)
    {
        for (int i = 1; i <= length; i++)
        {
            // Space
            for (int k = 1; k <= (length+1-i); k++)
            {
                System.out.print ("  ");
            }

            // Symbol
            for (int j = 1; j <= (2*i-1); j++)
            {
                System.out.print (" #");
            }
            System.out.println();
        }

        // Middle line
        for (int l = 1; l <= (2*length+1); l++)
        {
            System.out.print (" #");
        }

        System.out.println();

        for (int i = length; i >= 1; i--)
        {
            // Space
            for (int k = 1; k <= (length+1-i); k++)
            {
                System.out.print ("  ");
            }
            // Symbol
            for (int j = 1; j <= (2*i-1); j++)
            {
                System.out.print (" #");
            }
            System.out.println();
        }
    }


    public static void main (String [] args)
    {
        Scanner sc = new Scanner (System.in);

        System.out.print ("Half length: ");
        int length = sc.nextInt();

        diamond (length);
    }
}