Table 9. Metrics in set-3.

Metrics set	Metric name	Short form	Description/Formula
Halstead	Halstead length	N	N = N1 + N2
derived	Halstead level	L	L = V*/V
	Halstead difficulty	D	D = 1/L
	Halstead volume	V	V = N * log2(n1+n2)
	Halstead effort	E	E = V/L
	Halstead prog time	T	T = E/18
	Halstead error est	B	B = E2/3/1000
LoC	Loc total	LoC	The total number of lines for a given module
Metrics	Loc executable	LoEx	The number of lines of executable code for a module (not blank or comment)
	Loc blank	LoB	The number of blank lines in a module
	Loc comments	LoCm	The number of lines of comments in a module
	Loc code & comment	LoCoCm	The number of lines which contain both code and comment in a module
McCabe	Cyclomatic complexity	v(G)	v(G) = e - n + 2
Metrics	Design complexity	iv(G)	The design complexity of a module
	Essential complexity	ev(G)	The essential complexity of a module