Java_Basi/Butterfly.java at main · nikhilritgithub/Java_Basi · GitHub

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public class Butterfly {
    public static void Butterfly(int n){
        //1st half
        for(int i=1; i<=n; i++){
            //stars
            for(int j=1; j<=i; j++){
                System.out.print("*");
            }
            //spaces
            for(int j=1; j<=2*(n-i); j++){
                System.out.print(" ");
            }
            //stars
            for(int j=1; j<=i; j++){
                System.out.print("*");
            }
             System.out.println();
        }

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

    public static void main(String args[]){
        Butterfly(4);
    }
}