The third course in the specialization Introduction to Programming in C introduces the programming constructs pointers, arrays, and recursion. Pointers provide control and flexibility when programming in C by giving you a way to refer to the location of other data. Arrays provide a way to bundle data by guaranteeing sequences of data are grouped together. Finally, recursive functions—functions that call themselves—provide an alternative to iteration that are very useful for implementing certain algorithms. *****Note: Due to a recent spike in enrollments for the Introduction to Programming in C Specialization, we are currently having technical difficulties with programming environment for this course, which prevents some learners from completing the course's programming assignments. Until this matter is resolved, we recommend you choose to audit (https://learner.coursera.help/hc/en-us/articles/209818613-Enrollment-options) this course and study the video lessons until this matter is resolved. We will email all learners when this matter is resolved. We apologize for this inconvenience and are working diligently to remedy the problem. Please note that this does not impact the first course of this Specialization, Programming Fundamentals.