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.
Oplossing
So, undefined variables can also be declared using the undefined
keyword.
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Undefined
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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.
Oplossing
So, undefined variables can also be declared using the undefined
keyword.
Bedankt voor je feedback!
Awesome!
Completion rate improved to 2single