JavaScript Sprawdź, czy jest nan
function isNaN(x) {
return x !== x;
};
isNaN(NaN);//true
Grepper
function isNaN(x) {
return x !== x;
};
isNaN(NaN);//true// 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 .......
}