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 is the result of the following code: let x = 5; x = 'hello'; console.log(typeof x);?
A). number
B). string
C). undefined
D). object
What is the initial type of a variable declared with let a;?
A). null
B). number
C). undefined
D). object
Which type conversion happens automatically in the expression 3 + '5'?
A). Number to String
B). String to Number
C). Boolean to String
D). Number to Boolean
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
Given let a = '10'; let b = 20;, what is the result of a + b?
A). 30
B). 1020
C). 30
D). NaN
What is the result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
What will typeof NaN return in JavaScript?
A). number
B). NaN
C). undefined
D). object
Which operator is used to determine the type of a variable in JavaScript?
A). typeof
B). instanceof
C). type
D). isType
What will typeof null return in JavaScript?
A). null
B). undefined
C). object
D). number
What does the parseInt function do in JavaScript?
A). Converts a number to a string
B). Converts a string to an integer
C). Converts a boolean to a number
D). Converts an array to a number