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 of the following values is considered falsy in JavaScript?
A). 1
B). 0
C). 0
D). {}
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 will typeof null return in JavaScript?
A). null
B). undefined
C). object
D). number
What is the type of the value returned by parseFloat('3.14abc')?
A). number
B). string
C). NaN
D). undefined
What does the isNaN function do?
A). Checks if a value is not a number
B). Converts a value to a number
C). Checks if a value is a number
D). Converts a value to NaN
Which operator is used to determine the type of a variable in JavaScript?
A). typeof
B). instanceof
C). type
D). isType
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
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 typeof NaN return in JavaScript?
A). number
B). NaN
C). undefined
D). object
What is the initial type of a variable declared with let a;?
A). null
B). number
C). undefined
D). object