The book describes computational science as a field related to the design, execution and use of arithmetical models to evaluate and solve scientific complications. Generally, the word refers to the application of computers to simulate or numerically analyze scientific systems or processes. This book claims that because of the complexity of mathematics, massive amounts of calculations involved, or both of them, computational science enables people to perform tasks that were difficult to do before. The author claims that although computational models can't replace the laboratory, they have undoubtedly become a complex part of the entire search for scientific understanding. Computational science also allows researchers to build models for making predictions of what might happen in real life, such as weather pattern predictions.