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

When the same type is on both sides of the assignment operator.

Two variables that have the same information.

Declaring a variable with its exact type and defining it with a literal. 

Which of the following are examples of duplicated type information? Select all that apply.

Which of the following are examples of duplicated type information? Select all that apply.

`const` can confuse the developer by increasing the code's interactivity


`const` can confuse the developer because it is infrequently used. 


`const` can confuse the developer by increasing the code’s transparency.


2. What's the most probable way `const` can confuse a developer?


<ol start="2">
<li>What’s the most probable way <code>const</code> can confuse a developer?</li>
</ol>

The author might have omitted `const` on purpose.

3. What might the lack of `const` indicate?


<ol start="3">
<li>What might the lack of <code>const</code> indicate?</li>
</ol>

In many cases it might significantly improve performance.

If used incorrectly, it might decrease performance.

Yes, it increases the performance highly.

Does using the `const` will improve performance all the time? Select all that apply.

Does using the <code>const</code> will improve performance all the time? Select all that apply.

What are the usual arguments against using the `const` keyword?

What are the usual arguments against using the <code>const</code> keyword?

Here's a short quiz to test your understanding.

Introduction

Arguments using const

Local Variables

Local Members

Functions

Return Types

const Parameters

const and Smart Pointers

Rvalue References

Summary

Quiz