What is Cyclomatic complexity testing in OOAD

First try google for this then asked question,
What is cyclomatic complexity?[^]
Basically cyclomatic complexity testing techanique is used to insure that every part of software must tested.
to find of cyclomatic complexity
there are three way

1)FLOW GRAPH<br />
2)By using Edges and nodes<br />
   E(edges)-N(Nodes)+2<br />
3)By using Predicted nodes<br />
   Predicted nodes+1

It is basically a software metric used to analyse the execution path of programs, looking at loops and linear lines of execution.

You can read more here; http://en.wikipedia.org/wiki/Cyclomatic_complexity[^]