what is cyclomatic complexity? plz explain with example
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Answer Posted / mrinalini
Cyclomatic complexity is a metric used for complexity based
testing proposed by McCabe
McCabe actually proposed 3 metrics:cyclomatic,essential and
actual complexity.All 3 are based on the graphical
representation of the program being tested.First 2 are
calculated from the graph and the 3rd one is runtime metric.
mcCabe used the theory of graph in defining Cylocamatic
complexityThere are sets of
linearly independent program paths through any program
graph. A maximum set of these linearly
independent paths, called a basis set, can always be found.
Intuitively, since the program graph
and any path through the graph can be constructed from the
basis set, the size of this basis set should be related to
program complexity. hence in a layman's language Cyclomatic
complexity is number of Decision statements in the program
being tested plus one.
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