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.
12let 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.
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Completion rate improved to 2Undefined
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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.
12let 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.
Bytt til skrivebordet for virkelighetspraksisFortsett der du er med et av alternativene nedenforTakk for tilbakemeldingene dine!
Awesome!
Completion rate improved to 2single
