check if isnan javascript code example
Example 1: compare NaN in javascript if condititon
let num1 = Number("Vishal");
if(num1 == NaN){
....... Your Code .......
}
if(isNaN(num1){
.........Your Code .......
}
Example 2: isnan in javascript
var s = userInput[0];
if(isNaN(s) !== true)
{
console.log("yes");
}
else
{
console.log("no");
}
Example 3: javascript check if is nan
function isNaN(x) {
return x !== x;
};
isNaN(NaN);
Example 4: check if var is NaN
let b=1
let n=readline()
if(isNaN(b)){
console.log("You typed 0!")
}else{
console.log("You did not type 0!")
}