public class Week09Notes01A
{
	public static void main(String[] args)
	{
		// declare an array of ints
		int[] ai;
		// make an array of length read from user
		int l = (int) IO.readDouble("Your length > ");
		ai = new int[l];
		// walk array and make each element hold
		for (int i = 0;
			i < ai.length;
			i++)
		{
			// its index
			ai[i] = i;
		}
		ai[3] = 55; // causes ArrayIndexOutOfBoundsException if the 
					// value read for the length read from the user is < 3
	}
}