if (true) {
    // do something
} else if (false /*another condition*/) {
    // do something
} else {
    // do something
}

• semicolon only at the end of the line

(condition) ? (do if true) : (do if false);
age>=18     ? "adult"      : "child";        // returns "adult" or "child"!

// also works with function-calls inside
age>=18 ? console.log("over 18") : console.log("under 18");