ButterflyPattern.java

public class butterfly_pattern {
    
    public static void main(String args[]){

        for(int i=1; i<=5; i++){
            for(int j=1; j<=i; j++){
                System.out.print("* ");
            }
            
                for(int j=1; j<=2*(5-i); j++){
                    System.out.print(" ");
                }
    
                for(int j=1; j<=i; j++){
                    System.out.print("* ");
                }
            
            System.out.println();
            
        }

        for(int i=5; i>=1; i--){
            for(int j=1; j<=i; j++){
                System.out.print("* ");
            }
            
                for(int j=1; j<=2*(5-i); j++){
                    System.out.print(" ");
                }
    
                for(int j=1; j<=i; j++){
                    System.out.print("* ");
                }
            
            System.out.println();
            
        }

    }
    
}