CS173: Intro to Computer Science - Arrays

Activity Goals

The goals of this activity are:
  1. To be able to explain that an array is an ordered collection of data
  2. To be able to create an array and assign its elements
  3. To be able to access an element from an array by its index

Supplemental Reading

Feel free to visit these resources for supplemental background reading material.

The Activity


Consider the activity models and answer the questions provided. First reflect on these questions on your own briefly, before discussing and comparing your thoughts with your group. Appoint one member of your group to discuss your findings with the class, and the rest of the group should help that member prepare their response. Answer each question individually from the activity on the Class Activity Questions discussion board. After class, think about the questions in the reflective prompt and respond to those individually in your notebook. Report out on areas of disagreement or items for which you and your group identified alternative approaches. Write down and report out questions you encountered along the way for group discussion.

Model 1: Creating and Accessing Arrays

Java Visualizer Example of an Array
Manim Array Animation


  1. What is the size of the grades array?
  2. What are the indices of the grades array?
  3. Why does the array use .length, when a String uses .length(), to report its size?


Submit your answers to the questions using the Class Activity Questions discussion board. You may also respond to questions or comments made by others, or ask follow-up questions there. Answer any reflective prompt questions in the Reflective Journal section of your OneNote Classroom personal section.