C++ TutorialLesson 19Free preview

C++ Arrays

This lesson is part of C++ · All levels

Summary

This lesson discusses arrays, which are a collection of elements of the same type that are stored sequentially in memory and accessed through an index. Arrays make it easy to store a lot of data in a single variable name, such as a test score list. You also learn how to initialize an array and keep access from going out of bounds.

Key points

Array declarations: name type[number]; e.g. int data[5];.
The array index ranges from 0 to the sum of -1.
The array can be filled directly with an initialisation such as int a[3] = {10, 20, 30};.
Access beyond the limits of the index causes undefined behavior.

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