Diamond Pattern Program in Java Language

class Demo{
    public static void main(String args[])
    {
        int n=5;
        //Upper paret
        for(int i=1; i<=n; i++){
            //spaces
            for(int j=1; j<=n-i; j++){
                System.out.print(" ");
            }
            for(int j=1; j<=(2*i)-1; j++){
                System.out.print("*");
            }
           
            System.out.println();
        }
        //Lower part
         for(int i=n; i>=1; i--){
            //spaces
            for(int j=1; j<=n-i; j++){
                System.out.print(" ");
            }
            for(int j=1; j<=(2*i)-1; j++){
                System.out.print("*");
            }
           
            System.out.println();
        }
    }
}


OUTPUT:


* *** ***** ******* ********* ********* ******* ***** *** *


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