BEGIN {

	# make some strnums

	nf = split("|5apple|NaN|-NaN|+NaN| 6|0x1az|011Q|027", f, "|")

	for (i = 1; i <= nf; i++) {

		# NaN values on some systems can come out with

		# a sign in front of them. So instead of using %g to

		# convert the strnum to a double, do it manually, and

		# then remove any leading sign so that the test will

		# work across systems.

		val = f[i] + 0

		val = val ""

		val = tolower(val)

		sub(/^[-+]/, "", val)

		printf "[%s] -> %s (type %s)\n", f[i], val, typeof(f[i])

	}

}