/* SoloLearn.com - JavaScript Challenge
 * by brains */

var x = NaN;
var y = x;
if (x === y)
    console.log(true);
else console.log(false);

//-----------------------------

console.log(x, typeof x, y, typeof y, x === y);

a = 0;
b = a;
console.log(a, typeof a, b, typeof b, a === b);

a = Infinity;
b = a;
console.log(a, typeof a, b, typeof b, a === b);

false
NaN 'number' NaN 'number' false
0 'number' 0 'number' true
Infinity 'number' Infinity 'number' true