Gain insights into the C++ keyword 'const,' its usage in various contexts, and implications when returning pointers and references. Learn about preventing accidental data changes.

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In this course, you will learn about the C++ keyword const and its behaviour under different usage conditions, including local, global and static contexts. This course will help you to understand const and its implications when you attempt to return pointers and references in C++. By the end of the course, you will have a solid grip on const and its usage in preventing any accidental change of data.

Secure Coding Practices in C++: A Deep Dive into const

Returning a mutable pointer to a `const` value is useful. The pointed data cannot be modified, unlike `const` pointers, it is even taken into account by the compiler. As shown below.

# Constness of a pointer value
The constness of a pointed value is always taken into account.


Learn about the const for pointer values and how it works for type qualifiers. 

const int * func() const

Learn about the const for pointer values and how it works for type qualifiers.

Introduction

Arguments using const

Local Variables

Local Members

Functions

Return Types

const Parameters

const and Smart Pointers

Rvalue References

Summary

const int * func() const

Constness of a pointer value