BEGIN {

	a[1][1] = 10;

	a[1][2] = 20;

	a[1][3] = 30;

	a[2] = "hello world! we have multi-dimensional array"

	a[3, "X"] = "Y"

	print length(a), length(a[1])

	delete a[2]

	delete a[3, "X"] 

	a[2][1] = 100;

	a[2][2] = 200;

	a[2][3] = 300;

	for (i in a) {

		sum[i] = 0

		for (j in a[i])

			sum[i] += a[i][j]

	}

	print sum[1], sum[2]

	f(a[1])

	print a[1][1]

}

function f(x,   i)

{

	for (i=1;i<=length(x);i++)

		print x[i]

	x[1] = 1001

}