Pattern/ButterflyPattern.java at main · krishnagupta1543/Pattern · GitHub

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package com.company;
import java.util.*;
public class ButterflyPattern {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n;
        n = in.nextInt();
        //Upper Half
        for (int i = 1; i <= n; i++) {
            int space = 2*(n-i);
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            for (int k = 1; k <= space; k++) {
                System.out.print(" ");
            }
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
        //Lower Half
        for (int i = n; i >= 1; i--) {
            int space = 2*(n-i);
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            for (int k = 1; k <= space; k++) {
                System.out.print(" ");
            }
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }

    }

}