Kursusindhold
Introduction to JavaScript (staging)
Introduction to JavaScript (staging)
Undefined
What is Undefined
Undefined is also a data type in JavaScript just like the null. When a variable is created or declared without assigning any value to it, then the value of the variable will be set as undefined by default.
let age; console.log(age);
Swipe to start coding
Declare a variable numberOfItems and assign the value of undefined to the variable and show the value of the variable.
Løsning
So, undefined variables can also be declared using the undefined keyword.
Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående mulighederTak for dine kommentarer!
Undefined
What is Undefined
Undefined is also a data type in JavaScript just like the null. When a variable is created or declared without assigning any value to it, then the value of the variable will be set as undefined by default.
let age; console.log(age);
Swipe to start coding
Declare a variable numberOfItems and assign the value of undefined to the variable and show the value of the variable.
Løsning
So, undefined variables can also be declared using the undefined keyword.
Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående mulighederTak for dine kommentarer!
Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder