Assume the availability of a method named makeStars that can be passed a non-negative integer n and that returns a String of n asterisks.

LANGUAGE: JAVA

CHALLENGE:

Assume the availability of a method named makeStars that can be passed a non-negative integer n and that returns a String of n asterisks. Write a method named printTriangle that receives a non-negative integer n and prints a triangle of asterisks as follows: first a line of n asterisks, followed by a line of n-1 asterisks, and then a line of n-2 asterisks, and so on. For example, if the method received 5 it would print:

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

The method  must not use a loop of any kind (for, while, do-while) to accomplish its job. The method  should invoke makeStars to accomplish the task of printing a single line.

SOLUTION:

public void printTriangle(int n){
    if(n==0)
        return;
    System.out.println(makeStars(n));
    printTriangle(n-1);
}

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