Answers for "javascript number.isnan vs isnan"

Javascript

javascript number.isnan vs isnan

/**
* Number.isNaN is almost identical to ES5 global isNaN method. 
* Number.isNaN returns whether the provided value equals NaN. 
* This is a very different question from “is this not a number?”.
*/

Number.isNaN({}); // <- false, {} is not NaN
Number.isNaN('ponyfoo') // <- false, 'ponyfoo' is not NaN
Number.isNaN(NaN) // <- true, NaN is NaN
Number.isNaN('pony'/'foo') // <- true, 'pony'/'foo' is NaN, NaN is NaN

isNaN({}); // <- true, {} is not a number
isNaN('ponyfoo'); // <- true, 'ponyfoo' is not a number
isNaN(NaN); // <- true, NaN is not a number
isNaN('pony'/'foo'); // <- true, 'pony'/'foo' is NaN, NaN is not a number

Posted by: Guest on July-10-2021

isnan in javascript

var s = userInput[0];
  if(isNaN(s) !== true)
  {
      console.log("yes");
  }
  else
  {
      console.log("no");
  }

Posted by: Guest on December-20-2020

isNaN javascript

var j ="Hello World" // isNaN (j) returns true
  var n = 15; // isNaN (n) returns false

  if(isNaN(n) == true)   // NaN means >> Not a Number
  {
      console.log("yes, it's a string");
  }
  else
  {
      console.log("no, it's a number");
  }

Posted by: Guest on May-11-2021

Code answers related to "javascript number.isnan vs isnan"

Code answers related to "Javascript"

Javascript Answers by Framework

Browse Popular Code Answers by Language

Python

Javascript

Whatever

Shell/Bash

CSS

Html

PHP

SQL

Java

Answers for "javascript number.isnan vs isnan"

Code answers related to "javascript number.isnan vs isnan"

Code answers related to "Javascript"

Javascript Answers by Framework

Browse Popular Code Answers by Language

Popular Programming Languages

Advertisements

Company

Compilers

Help

Connect with us