How can i print a triangle with “*”s using for loop in java?

Question

I want to draw a triangle with stars like below using for loop, but i really don\'t have any idea of how to do this ? Triangle is going to be like this:

*
**
**         


        

Answer 1

          import java.util.*;

          class StarForloop
{
          public static void main(String arg[])
    {
          Scanner ob=new Scanner(System.in); //getting input
          System.out.println("Enter any NO");

          int count=ob.nextInt(); 
        String ab="*";  // initialize string variable

          for(int i=1; i<=count; i++)
        {

           ab=ab+"*"; // here you add one another string
            System.out.println(ab);


        }           
    }
}