JavaCodes/ButterflyPattern.java at master · Anjali853/JavaCodes · GitHub

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public class ButterflyPattern {
    public static void main(String[] args){
        int n = 5;

        for(int i = 1; i <= n; i++){

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

        }

        for (int i = n; i >= 1; i--){

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

    }
}