For loop practice

Practice.java

public class Practice
{
	public static void main(String[] args) {

		// How can you replace the hard coded numbers
		// with a variable?
		System.out.println(1);
		System.out.println(2);
		System.out.println(3);
		System.out.println(4);
		System.out.println(5);
		System.out.println(6);
		System.out.println(7);
		System.out.println(8);
		System.out.println(9);

		// How can you replace this code with a while loop?
		int i = 1;
		System.out.println(i);
		i++;
		System.out.println(i);
		i++;
		System.out.println(i);
		i++;
		System.out.println(i);
		i++;
		System.out.println(i);
		i++;
		System.out.println(i);
		i++;
		System.out.println(i);
		i++;
		System.out.println(i);

		// Now suppose I want to go from 10-20 instead of 1-9.
		// What do you need to change?
		i = 1;
		while(i < 9) {
			System.out.println(i);
			i++;
		}

		// How can you replace this code with a for loop?
		int[][] arr = new int[3][3];
	}
}