Question

In JAVA

Write a RECURSIVE method that receives as a parameter an integer named n. The method will output n # of lines of stars. For example, the first line will have one star, the second line will have two stars, and so on.

The line number n will have "n" number of ****** (stars)

so if n is 3 it would print

*

**

***

The method must not have any loops!

Answer 1

CODE

public class MyClass {
    public static void doStarsHelper(int n, int lines, int x)
    {
        if(n == lines && x == lines)
            return;
        if(x == lines)
        {
            System.out.println();
            doStarsHelper(n, lines+1, 0);
        }
        else
        {
            System.out.print("*");
            doStarsHelper(n, lines, x+1);
        }
    }
    
    public static void doStars(int n)
    {
        doStarsHelper(n, 1, 0);
    }
    
    public static void main(String args[]) {
        doStars(5);
    }
}

OUTPUT

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