Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Lære JavaScript and Type Conversion | Data Types and Variables
Introduction to JavaScript

Stryg for at vise menuen

book
JavaScript and Type Conversion

JavaScript is a dynamic-type language:

We can assign any type of value to a variable. We can also change the type of a variable at any time and any position in the code. Let’s say we have assigned a string value to a variable, and then we want to change the type of that variable to a number.


              
123

            
let totalPrice = "thousand";
totalPrice = 1000;
console.log(totalPrice);
copy
Opgave

Swipe to start coding

A variable named totalDaysInMonth with the assigned string value of thirty has been given to you. Your task is to change the type of the variable from string to a number and display it on the console.

Løsning

Summary:

  • The number datatype is for all kinds of numbers like integer or floating-point numbers.
  • The boolean variables can only have true or false as their values.
  • The typeof operator allows us to see the type of value stored in a variable.
  • JavaScript is a dynamic-type language, so we can change the type of data in it.

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 3
single

single

Spørg AI

expand

Spørg AI

ChatGPT

Spørg om hvad som helst eller prøv et af de foreslåede spørgsmål for at starte vores chat

close

Awesome!

Completion rate improved to 2

book
JavaScript and Type Conversion

JavaScript is a dynamic-type language:

We can assign any type of value to a variable. We can also change the type of a variable at any time and any position in the code. Let’s say we have assigned a string value to a variable, and then we want to change the type of that variable to a number.


              
123

            
let totalPrice = "thousand";
totalPrice = 1000;
console.log(totalPrice);
copy
Opgave

Swipe to start coding

A variable named totalDaysInMonth with the assigned string value of thirty has been given to you. Your task is to change the type of the variable from string to a number and display it on the console.

Løsning

Summary:

  • The number datatype is for all kinds of numbers like integer or floating-point numbers.
  • The boolean variables can only have true or false as their values.
  • The typeof operator allows us to see the type of value stored in a variable.
  • JavaScript is a dynamic-type language, so we can change the type of data in it.

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!

close

Awesome!

Completion rate improved to 2

Stryg for at vise menuen

some-alt