public static String pattern ( int n) {
        if(n<1) return "";
        String finaloutput ="";
        for(int i=1; i<=n; i++) {
            for(int j=n; j>=i; j--)
            finaloutput=finaloutput+j;
            finaloutput=finaloutput+"\n";
        }

        return finaloutput.substring(0,finaloutput.length()-1);

    }