Developing Algorithms Chapter Notes | Information and Communications Technology (ICT) for Grade 12 PDF Download

Introduction

Developing algorithms is a core concept in AP Computer Science Principles, focusing on creating step-by-step solutions to solve problems. This chapter explains what algorithms are and how they can be designed in different ways to achieve the same goal. It discusses using existing algorithms, combining or modifying them, and creating new ones from scratch. The chapter also highlights the benefits of using tested algorithms and the importance of proper citation. Understanding how to develop algorithms helps programmers solve problems efficiently and effectively.

Algorithms

• Algorithms are step-by-step instructions designed to solve a specific problem or complete a task.
• They provide a clear and organized way to achieve a goal in a program.
• Different algorithms can be used to solve the same problem, depending on the needs of the programmer or program.
• New algorithms can be created from scratch or by combining and modifying existing ones.
• Existing algorithms can be ones you’ve written or ones created by others.

Existing Algorithm Types

• Using existing algorithms saves time in development and testing because they are already reliable.
• They simplify the debugging process since the algorithm itself is less likely to cause errors.
• Examples of existing algorithms include:
  • Finding the maximum or minimum value in a set of numbers.
  • Calculating mathematical results like sums or averages.
  • Guiding a robot through a maze using a route-finding algorithm.
  • Compressing data to reduce file size (related to Big Idea 2).
  • Sorting a list in a specific order, like ascending or descending.
• When using someone else’s algorithm, proper citation is necessary, as noted in Big Ideas 1 and 5.

Key Terms