In this chapter you learned how to create programs and functions from MATLAB scripts. There are several different kinds of functions, and we saw how to take advantage of their different properties. Now that you know how to create programs and functions, you will want to learn more about MATLAB programming to solve challenging and practical problems. Probably, the hardest parts about solving a problem are (1) understanding the problem and (2) developing a method of solution. Then come: (3) developing an algorithm to implement the method of solution and (4) modularizing the algorithm to develop an efficient program with supportive functions. These steps may or may not lead to correct solutions. This will require checking and properly interpreting program output. After you have completed this chapter, you will know how to create a program, create and use functions, use MATLAB in its program mode of operation and create your own toolbox of function m-files that you can add to the MATLAB search path.