javascript check if is nan
function isNaN(x) {
return x !== x;
};
isNaN(NaN);//truejavascript check if is nan
function isNaN(x) {
return x !== x;
};
isNaN(NaN);//truecompare NaN in javascript if condititon
// Use isNaN()
// In javascript compare NaN direct alweys return false
let num1 = Number("Vishal");
// This code never work
if(num1 == NaN){ // Direct compare NaN alweys return false so use isNaN() function
....... Your Code .......
}
// This code work
if(isNaN(num1){
.........Your Code .......
}isnan in javascript
var s = userInput[0];
if(isNaN(s) !== true)
{
console.log("yes");
}
else
{
console.log("no");
}nan in js
var val = Number.NaN;Copyright © 2021 Codeinu
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