Answer & Solution
Answer: Option B
Solution:
The Number function converts the string '123' to the number 123, changing the type of z to number.
Q
What will be the result of the following code: let z = '123'; z = Number(z); console.log(typeof z);?
Related Questions on Average
What does it mean that JavaScript is dynamically typed?
A). Variables do not have types
B). Variables can change type
C). Variables must be declared with a type
D). Variables cannot change type
Which operator is used to determine the type of a variable in JavaScript?
A). typeof
B). instanceof
C). type
D). isType
Given let a = '10'; let b = 20;, what is the result of a + b?
A). 30
B). 1020
C). 30
D). NaN
What happens when you add a number and a string in JavaScript?
A). An error is thrown
B). The number is converted to a string
C). The string is converted to a number
D). Both are converted to boolean
Which of the following values is considered falsy in JavaScript?
A). 1
B). 0
C). 0
D). {}
What is the initial type of a variable declared with let a;?
A). null
B). number
C). undefined
D). object
What will typeof NaN return in JavaScript?
A). number
B). NaN
C). undefined
D). object
What is the type of the value returned by JSON.parse('null')?
A). null
B). string
C). object
D). undefined
What is the result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
In JavaScript, what will be the type of a variable x after x = 5 + true;?
A). number
B). string
C). boolean
D). undefined