Question:Which of the following is the built-in function of any function in JavaScript? 

A toString() 
B toPrint() 
C toConcat() 
D None 

+ Answer
A 

+ Explanation
Example:
function add(a,b){
    return a+b;
}
function sub(a,b){
   return a-b
}

let a=add(3,4).toString(); // calling toString() function of add() function
let b=sub(3,2);

document.write(a+b); //71

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Mohammad Towhidul Islam

Editor, VCampus

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