Interview Questions

1. What does the isNaN() function?

The isNan() function returns true if the variable value is not a number. 

For example:

function number(num) {  

  if (isNaN(num)) {  

    return "Not a Number";  


  return "Number";  



// expected output: "Not a Number"  



// expected output: "Number"

By Md Riyazuddin 2 0
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