Let's write a simple markdown parser function that will take in a single line of markdown and be translated into the appropriate html.

Here is the answer in Java with appropriate comments for understanding

Explanation:

import java.util.Scanner;

public class Hash {

public static void main(String[] args) {

System.out.print("Enter a string : ");

Scanner scanner = new Scanner(System. in);

String s = scanner. nextLine();   //read string

int k=s.lastIndexOf('#'),count=0;//find last occurence of # then take the next part

  String s2="",s3="";

  for(int i=0;i<s.length();i++)

  {

      if(s.charAt(i)=='#')

          count++;//count the occurence of # of level of heading h1,h2,h3,

  }

  for(int j=k+1;j<s.length();j++)

  {

      s2+=s.charAt(j);//take the remainging string after #

  }

// System.out.println(k);

//System.out.println(count);

if(count<=6)//if it is valid heading

{

  s3="<h"+count+">"+s2+"</h"+count+">";

  System.out.println(s3);  

}

else

  System.out.println("Invalid header");

}

}