Question Unknown Command

[goigois1]

client.on("friendMessage", function(steamID, message) {

if (message == "!test") {

client.chatMessage(steamID, "test")

}

if (message == "") {

client.chatMessage(steamID, "")

}

if (message == "") {

client.chatMessage(steamID, "" )}

 

if (message == "!mystery") {

client.chatMessage(steamID, "" )}

}

});

Script That I'm Using Anyone Can Help Me?
I Want to add Unknown Command , but , dont know how

[Enemtia]

if - else if - else

client.on("friendMessage", function(steamID, message) {
	
	if (message == "!test") {
		
		client.chatMessage(steamID, "test");
	}else if(message == "!mystery"){
		
		client.chatMessage(steamID, "mystery");
	}else{
		
		client.chatMessage(steamID, "Unknown Command");
	}
});

or switch

client.on("friendMessage", function(steamID, message) {
	
	switch(message){
		
		case "!test":
		
			client.chatMessage(steamID, "test");
			break;
			
		case "!mystery":
		
			client.chatMessage(steamID, "mystery");
			break;
			
		default:
		
			client.chatMessage(steamID, "Unknown Command");
	}
});