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showing results for - "compare nan in javascript if condititon"
Alessia
23 Jan 2019
1function isNaN(x) {
2   return x !== x;
3};
4isNaN(NaN);//true
source
Teddy
12 Nov 2016
1// Use isNaN() 
2// In javascript compare NaN direct alweys return false
3let num1 = Number("Vishal");
4
5// This code never work
6if(num1 == NaN){  // Direct compare NaN alweys return false so use isNaN() function
7  ....... Your Code .......
8}  
9
10// This code work
11if(isNaN(num1){
12  .........Your Code .......
13}
14
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