Discussion on: Learning Algorithms with JS, Python and Java 9: Printing Steps

Thanks for the comment.

I know I can do without StringBuilders, but I make it a rule to use them for performance.

Using the iterative Java code above, it took 14 seconds when the parameter is 10000.

With this code:

static void stepsWithoutStringBuilder(int n) {
    for (int row = 0; row < n; row++) {
        String stair = "";
        for (int column = 0; column < n; column++) {
            if (column <= row) {
                stair += "#";
            } else {
                stair += " ";
            }
        }
        System.out.println(stair);
    }
}

it took 243 seconds for 10,000 steps!

I've always used Java 8 and I like Java for its strong typing, so I'm surprised to learn about the "var" in Java 10. I'm not sure if I'll like it or not, but anyway thank you for the information!