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Question: What is cyclomatic complexity and why is it important?

Answer: Cyclomatic complexity is a computer science metric (measurement) developed by Thomas McCabe used to generally measure the complexity of a program. It directly measures the number of linearly independent paths through a program’s source code.
The concept, although not the method, is somewhat similiar to that of general text complexity measured by the Flesch-Kincaid Readability Test.
Cyclomatic complexity is computed using a graph that describes the control flow of the program. The nodes of the graph correspond to the commands of a program. A directed edge connects two nodes, if the second command might be executed immediately after the first command. By definition,
CC = E - N + P
where
CC = cyclomatic complexity
E = the number of edges of the graph
N = the number of nodes of the graph
P = the number of connected components

Cyclomatic complexity is a computer science metric (measurement) developed by Thomas McCabe used to generally measure the complexity of a program. It directly measures the number of linearly independent paths through a program’s source code.
The concept, although not the method, is somewhat similiar to that of general text complexity measured by the Flesch-Kincaid Readability Test.
Cyclomatic complexity is computed using a graph that describes the control flow of the program. The nodes of the graph correspond to the commands of a program. A directed edge connects two nodes, if the second command might be executed immediately after the first command. By definition,
CC = E - N + P
where
CC = cyclomatic complexity
E = the number of edges of the graph
N = the number of nodes of the graph
P = the number of connected components
Source: CoolInterview.com

cyclomatic complexity defines, how much complex does our computer program is. means, it defines the overall degree of hardness in working of our program.
if we are working through flow graphs,we can define cyclomatic complexity(CC) as ...
CC= P + 1....
i.e.
P- no. of predicate nodes.which means no. of nodes from which two or more than two edges are falling out. Source: CoolInterview.com

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