Chapter Summary 2.1 Using the Problem-Solving Model • Solving a problem requires understanding the problem, devising a plan, carrying out the plan, and evaluating the success of the plan. • The steps used to solve a problem are called an algorithm. 2.2 Solving Problems • A computer cannot solve a problem without an algorithm written by a human. • Solving many different types of problems is good practice for improving problem-solving skills. 2.3 Writing Algorithms • An algorithm must be clear and complete for it to be used by a computer. • Each step in the algorithm accomplishes one part of the solution. Check Your Computer Science IQ Now that you have finished this chapter, see what you know about computer science by taking the chapter posttest. The posttest is available at www.g-wlearning.com. 38 Introduction to Computer Science: Coding Copyright Goodheart-Willcox Co., Inc.