enum temperature{
    cold,
    hot
}

let temp = temperature.cold;

switch (temp) {
    case temperature.cold:
        console.log("Brrr....");
        break;
    case temperature.hot:
        console.log("Yikes...")
        break;
}

function how_cold(celsius: number): temperature {
    return celsius > 40 ? temperature.hot : temperature.cold;
}

let temp = how_cold(35); // type is "temperature"

switch (temp) {
    case temperature.cold:
        console.log("Brrr....");
        break;
    case temperature.hot:
        console.log("Yikes...")
        break;
}

let temp = temperature.cold;

switch (+temp) {
    case temperature.cold:
        console.log("Brrr....");
        break;
    case temperature.hot:
        console.log("Yikes...")
        break;
    case 5:
        console.log("What??");
        break;
}

if (!!enumVal) {
    switch (enumVal) {
         case EnumClass.First // the if clause automatically excludes the first item