Question

How to check if floating point is NaN in TypeScript

Answer 1

const value: any = NaN;
 
console.log(Number.isNaN(value)); 
  
  
 
/*
run:
 
true
 
*/

 

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Answer 2

const value: any = NaN;
 
console.log(isNaN(value)); 
  
  
 
/*
run:
 
true
 
*/
 

 

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Answer 3

const value: any = NaN;
 
console.log(value !== value); 
  
  
 
/*
run:
 
true
 
*/
 

 

70+ SQL courses for beginners and professionals