Question

Which one of the following is correct output for the following given JavaScript code:

var  obj=  

{  

    length:20,  

    height:35,  

}  

if('breadth' in obj === false)   

{  

    obj.breadth = 12;  

}  

   

console.log(obj.breadth);  

a) Error

b) Undefined

c) 12

d) 20

Answer 1

Answer: C

Reason: In the above given JavaScript code, the "in" operator is used which checks (or performs search) for the specific property. If the certain property is found it returns true otherwise it returns false.