Question

How to check if value is NaN in JavaScript

Answer 1

console.log(isNaN('javascript'));
console.log(isNaN(undefined));
console.log(isNaN('NaN'));
console.log(isNaN(NaN)); 
console.log(isNaN(18 / 0));
console.log(isNaN(23452));  
  

  
  
/*
run:
  
true
true
true
true
false
false
  
*/

 

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