Table 2. Halstead operators with their corresponding decomposed operators.

Base metrics	Decomposed metrics	Description
Total operators (N1)	As	Total assignment operators
	A	Total arithmetic operators
	R	Total relational operators
	Log	Total logical operators
	O	Total operators other than assignment, arithmetic, relational, and logical operators
Unique operators (n1)	as	Unique assignment operators
	a	Unique arithmetic operators
	r	Unique relational operators
	log	Unique logical operators
	o	Unique operators other than assignment, arithmetic, relational, and logical operators