const

C++ Easy · Lesson 1 · On the house

const

A promise not to change. Lesson 1 is free — on the house.

Lessons · C++ Easy · Lesson 1 of 10 · On the house

const

A promise not to change.

Illustration for the C++ course — Lesson 1 is on the house. The rest opens with the paper, the Daily, or a gift.

This is C++ · easy, lesson 1: const. Read the teaching and the stills before the checks. The quizzes are open book and test the subject — C++ itself — not product rules or layout trivia.

You already finished Introductory. I will not re-teach the absolute first hello. We build upward.

const int n = 3; cannot be reassigned.

Const documents intent to readers and compilers.

Const references avoid copies without allowing mutation.

Prefer const by default when values should not change.

const

const int n = 3;

Match this when you type. Open book.

Sit with that still. Trace it top to bottom. Name each piece. The exercise asks you to match its essence.

If something fails when you try it yourself, change one thing. Read the error. Return to the still. I will not rush you.

Quiz

What does const int n = 3 mean?

n cannot be reassigned
n is a function
n is always 0
n is a pointer

Quiz

Why use const?

Document and enforce non-mutation
Speed the linker only
Replace int
Disable warnings

Quiz

Can you write n = 4 after const int n = 3?

No — it is a compile error
Yes — silently
Yes — at runtime only
Only in main

Quiz

Based on today's teaching, which claim is right?

Immutable binding.
The opposite of what the lesson said
The lesson forbade this topic
None of the subject material applies

Quiz

Based on today's teaching, which claim is right?

Intent + enforcement.
The opposite of what the lesson said
The lesson forbade this topic
None of the subject material applies

Quiz

Based on today's teaching, which claim is right?

Compile error.
The opposite of what the lesson said
The lesson forbade this topic
None of the subject material applies

Quiz

Based on today's teaching, which claim is right?

Immutable binding.
The opposite of what the lesson said
The lesson forbade this topic
None of the subject material applies

Check

Match the still for: const.

That is the lesson. When every quiz and exercise on this page is green, mark it passed. Next lesson when you are ready.

Open-book: the answers are on this page. Pass every quiz and check (8) to mark the lesson done. This visit: 0/8.

const · C++ Easy (free) — The Gold Standard