JavaScript Type Gotchas

JavaScript

var a = prompt();
console.log(a);
if (a % 2 == 0)
{
    console.log("Even");
}
else
{
  console.log("Odd")
}

if (a >= 70)
{
    console.log("You look great!");
}
else if (a <= 18)
{
  console.log("You should be in school!")
}
else
{
   console.log("GET A JOB, LOSER!") 
}