ABC Metric

ABC is strictly a software size metric, although it has often been misconstrued as a complexity metric.

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• Assignment – an explicit transfer of data into a variable, e.g. = *= /= %= += <<= >>= &= |= ^= >>>= ++ --
• Branch – an explicit forward program branch out of scope – a function call, class method call, or new operator
• Condition – a logical/Boolean test, == != <= >= < > else case default try catch ? and unary conditionals.

A scalar ABC size value (or “aggregate magnitude”) is computed as:

|ABC| = sqrt((A*A)+(B*B)+(C*C))

Source: Abc Metric