![]() ![]() Add one point for each conditional construct, such as an "if" condition.Assign one point to account for the start of the method.In modern parlance, especially for the Java developer, we can simplify the McCabe cyclomatic complexity metric calculation with the following rules: M = E - N + 2P Calculate cyclomatic complexity in Java The original guidance for calculating the McCabe cyclomatic complexity metric (M) discusses edges (E), nodes (N) and connected components (P), giving us the following formula: Since the McCabe cyclomatic complexity metric was coined twenty years before the Java programming language was invented, some of the original verbiage that describes how it works doesn't translate particularly well to the modern realm of object oriented programming (OOP). Traditional cyclomatic complexity calculations A low McCabe cyclomatic complexity score of 4 or 5 is always preferred. As the McCabe cyclomatic complexity metric rises, you'll need to write more unit tests, and it'll be a challenge to ensure complete code coverage. A lower number means you'll have to write fewer unit tests in order to ensure a given piece of software has tests for every conceivable permutation. The lower the number is, the fewer linear paths of execution the code contains. McCabe, the cyclomatic complexity metric is always provided as a whole number. ![]()
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