forthesakeofargument.js

/** 
For the sake of argument 


Write a function named numbers that returns true if all the parameters it is passed are of the Number type. Otherwise, the function should return false. The function should accept any number of parameters.

Example usage:

numbers(1, 4, 3, 2, 5); // true
numbers(1, "a", 3); // false
numbers(1, 3, NaN); // true

**/

function numbers(){
  var args = Array.prototype.slice.call(arguments, 0);
  var allNumbers = true;
  for(var i = 0, y = args.length; i < y; i++){
    if(typeof args[i] !== "number"){
      console.log(args[i]);
      console.log("It isn't' a number!"); 
      allNumbers = false;

    }
  }
  return allNumbers;
}