JAVASCRIPT

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");
  }

what is the use of isnan function in javascript?

// what is the use of isNaN function in javascript?
isNan function returns true if the argument is not a number; otherwise, it is false.