AP Computer Science Principles

Advanced Placement Computer Science Principles exploring computational thinking and programming.

Basic Concepts

Algorithms and Problem Solving

Step-by-Step Solutions

Algorithms are the backbone of computer science. They are a list of clear steps that solve a problem or perform a task.

Designing an Algorithm

  • Understand the problem: What are you trying to solve?
  • Plan the steps: Write out each action needed.
  • Test and improve: Try it out and see if it works.

Pseudocode and Flowcharts

Before writing code, programmers often use pseudocode (plain language steps) or flowcharts (diagrams) to plan out their algorithms.

Everyday Algorithms

Making a peanut butter and jelly sandwich can be an algorithm! List each step to make sure nothing is left out.

Importance in Computer Science

Good algorithms make programs run faster and more efficiently. They are used in everything from sorting your emails to finding the fastest route on a map.

Examples

  • Sorting a list of names alphabetically.

  • Following the steps to solve a math equation.

In a Nutshell

Algorithms are step-by-step instructions to solve problems, used everywhere in computing.

Key Terms

Pseudocode
Writing out the steps of an algorithm in plain language.
Flowchart
A diagram showing the sequence of steps in an algorithm.