JavaScript branching example

javascript_branching.js

var s = Number(prompt("How old are you?"));

if (s <= 10) {
    console.log("You're a young one!");
} else if (s <= 20) {
    console.log("Those rowdy teen years...");
} else if (s <= 30) {
    console.log("You got time, don't worry.");
} else {
    console.log("Over 30? Man, hurry up and do something with your life.");
}

var l = prompt("Give me a letter");

switch (l) {
    case 'a' :
    case 'b' :
    case 'c' :
        console.log("Easy as 123!"); // this will fall through until it hits a break
    case 'd' :
        console.log("Dirty dog!");
        break;
    default :
        console.log("That's a crummy letter!");
        break;
}