nan in javascript code example

Example 1: nan javascript

// NaN:  Not a Number in javascript
console.log(parseInt('1.23'));				// 1.23
console.log(parseInt('something'));			// NaN

Example 2: isnan in javascript

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

Example 3: javascript nan

NaN = Not a number.

Example 4: nan in js

var val = Number.NaN;