This book is intended for an introductory course in MATLAB programming in Science, Technology, Engineering, and Mathematics (STEM) fields. The book has nine modules which have been each broken down by lessons. Modules 1-4 focus on MATLAB and programming basics like the MATLAB program interface, programming variables, different types of data, debugging, plotting, and applications to science and engineering problems. In the Modules 5-8, the user is introduced to basic programming concepts of conditional statements, repetition (loops), and custom functions. In Module 9, program input/output is shown with writing to and reading from external files. Important appendices include a primer on matrix algebra, a collection of mini-projects, and introduction to animating plots.