Lesson 5.1 · College Board Unit 4
Array Basics
An array has a fixed length, and its indices run from 0 through length - 1. New int array elements start at 0.
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Unit 5: Arrays
Fixed-size indexed storage, and the first place two variable names can refer to the same data. Aliasing is what makes array questions harder than they look.
Lessons and exercises
Lesson 5.2 · College Board Unit 4
Array Traversal
Use indexed traversal when positions matter or elements must be replaced. An enhanced for loop provides each element value, not an assignable array slot.
Lesson 5.3 · College Board Unit 4
Array Mutation
Assignments replace array elements immediately. Copying the reference creates an alias; copy elements into a new array when the original must remain unchanged.
Lesson 5.4 · College Board Unit 4
Array Search
Linear search checks candidates in order and returns as soon as the contract is satisfied. Use -1 to signal that no index was found.
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