The aim of the book "Computational Physics" is to serve as textbook on applied Computational Physics. Contents of this book together with those of 7 monographs of the author listed in the references form a coherent course text, i.e., lecture notes for a 2-semester course for final year undergraduate students of Physics and Mathematics major for the course titled Computational Physics. Instead of solving problems of unphysical numerical analysis, this book illustrates use of different computational methods by solving problems of Physics and mathematical Physics. For example, root finding methods have been illustrated by calculating bound state energy of Quantum Well. This is the 1st Mathematica-based textbook titled "Computational Physics". Every computational method considered has been illustrated by thoroughly worked out exercise. This pedagogical feature of the book is very important. The book has been designed for use in classroom as well as in Computational Physics Lab.