let.js

let x;

if(typeof x === "string"){
	console.log("This is a string");
}
else if(typeof x === "number"){
	console.log("This is a number");
}
else if(typeof x === "object"){
	console.log("This is a object");
}
else if(typeof x === "undefined"){
	console.log("This is a object");
}
else {
	console.log("I cannot see what this is");
}

// This is a object