The book "Computational Physics" offers a comprehensive introduction to the application of numerical algorithms for solving physical problems for which a quantitative theory already exists. It is often considered a subfield of theoretical physics, but it also serves as a bridge between theoretical and experimental physics. Physicists often have precise mathematical theories that describe the behavior of systems. However, in many cases, it is not practical to solve the equations of these theories ab initio to make useful predictions. This is especially true in quantum mechanics, where only a few simple models provide complete analytical solutions. In situations where systems can only be solved numerically, computer-based methods are employed. This textbook is aimed at students and professionals who wish to develop a deeper understanding of the connection between theory and practical application in physics.