THINK++ — Engineering Visualized

Collection

C++ Arrays

An array is a collection of elements of the SAME type stored in contiguous memory locations. It's the most basic data structure for storing lists of items.

DECLARATION & ACCESS

int arr[5] = {1, 2, 3, 4, 5};

cout << arr[0]; // 1 (First element)
cout << arr[4]; // 5 (Last element)

FIXED SIZE

The size must be known at compile time and cannot be changed later.

ZERO INDEXED

Indices range from 0 to (size - 1).

OUT OF BOUNDS

C++ doesn't check array boundaries at runtime. Accessing arr[size] leads to undefined behavior or crashes.

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