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Learn Constant | Variables
Introduction to C++ | Mobile-Friendly

bookConstant

If you have a static variable that never changes and you want that nobody overrides your variable, use the const keyword by declaration. It makes the variable unchangable (constsant).

For example:

const double x = 42;

The variable x will always be 42 and nobody can change it. The following code would cause an error:

const int x = 10;
x = 15;

You should declare variables as constants if you are sure that they will probably never change:

const int monthPerYear = 12;
const char firstAlphabetLetter = 'A';
question-icon

Define the variable secondsPerMinute as the const variable:

;

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SectionΒ 2. ChapterΒ 8

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bookConstant

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If you have a static variable that never changes and you want that nobody overrides your variable, use the const keyword by declaration. It makes the variable unchangable (constsant).

For example:

const double x = 42;

The variable x will always be 42 and nobody can change it. The following code would cause an error:

const int x = 10;
x = 15;

You should declare variables as constants if you are sure that they will probably never change:

const int monthPerYear = 12;
const char firstAlphabetLetter = 'A';
question-icon

Define the variable secondsPerMinute as the const variable:

;

Click or drag`n`drop items and fill in the blanks

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 2. ChapterΒ 8
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