This content originally appeared on DEV Community and was authored by Esraa
let a = 3;
let b = new Number(3);
let c = 3;
console.log(a == b);
console.log(a === b);
console.log(b === c);
A: true false true
B: false false true
C: true false false
D: false true true
Answer: C
new Number() is a built-in function constructor. Although it looks like a number, it's not really a number: it has a bunch of extra features and is an object.
When we use the == operator, it only checks whether it has the same value. They both have the value of 3, so it returns true.
However, when we use the === operator, both value and type should be the same. It's not: new Number() is not a number, it's an object. Both return false.
This content originally appeared on DEV Community and was authored by Esraa
Esraa | Sciencx (2021-06-23T23:43:36+00:00) Javascript Questions. Retrieved from https://www.scien.cx/2021/06/23/javascript-questions/
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