Answer & Solution
Answer: Option B
Solution:
When a number is added to a string, the number is converted to a string and concatenated.
Q
What happens when you add a number and a string in JavaScript?
Related Questions on Average
Which operator is used to determine the type of a variable in JavaScript?
A). typeof
B). instanceof
C). type
D). isType
What is the type of the value returned by parseFloat('3.14abc')?
A). number
B). string
C). NaN
D). undefined
What will typeof NaN return in JavaScript?
A). number
B). NaN
C). undefined
D). object
In JavaScript, what will be the type of a variable x after x = 5 + true;?
A). number
B). string
C). boolean
D). undefined
What will be the result of the following code: let z = '123'; z = Number(z); console.log(typeof z);?
A). string
B). number
C). undefined
D). boolean
Given let a = '10'; let b = 20;, what is the result of a + b?
A). 30
B). 1020
C). 30
D). NaN
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 is the result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
What is the type of the value returned by JSON.parse('null')?
A). null
B). string
C). object
D). undefined
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