My solution to the triangle coding challenge.

SolutionTriangleCodingChallenge.java

// Challenge description:
// Make a function that takes as an argument n the number of lines, and output a triangle a triangle drawed by stars.
// Example: for n = 3
//      *
//     ***
//    *****

public class SolutionTriangleCodingChallenge {
    public static void draw(int n) {
        int total = 1 + 2*(n-1); // number of stars in the last line
        for(int i = 0; i < n; i++) {
            int stars = 1 + 2*i;
            int emptySpace = total - stars;
            emptySpace /= 2;
            for(int e=0;e<emptySpace;e++) System.out.print("_");
            for(int s=0;s<stars;s++) System.out.print("*");
            for(int e=0;e<emptySpace;e++) System.out.print("_");

            System.out.print("\n");
        }
    }

    public static void main(String[] args) {
        draw(10);
    }
}