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What are Variables?

What are Variables?

Variables are the memory locations that are used to store data. In JavaScript, we use the let, const, and var (var is not used now) keywords to declare a variable.

By using let we can re-assign the value to a variable. Values can not be reassigned if they are created using const.

The following statement creates a variable named message.


              
1

            
let message;
copy

Now we can assign some data to the variables by using the assignment operator sign (=), for example.


              
12345

            
let message;
message = 'Hello';
// or you can do it in one line as well like this
// let message = 'Hello';
console.log(message);
copy
Opgave

Swipe to start coding

Declare a variable named numberOfStudents and assign the value 100 and display it on the console.

Løsning

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Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 3. Kapitel 1
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book
What are Variables?

What are Variables?

Variables are the memory locations that are used to store data. In JavaScript, we use the let, const, and var (var is not used now) keywords to declare a variable.

By using let we can re-assign the value to a variable. Values can not be reassigned if they are created using const.

The following statement creates a variable named message.


              
1

            
let message;
copy

Now we can assign some data to the variables by using the assignment operator sign (=), for example.


              
12345

            
let message;
message = 'Hello';
// or you can do it in one line as well like this
// let message = 'Hello';
console.log(message);
copy
Opgave

Swipe to start coding

Declare a variable named numberOfStudents and assign the value 100 and display it on the console.

Løsning

Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 3. Kapitel 1
Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Vi beklager, at noget gik galt. Hvad skete der?
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