05. Journey

function journey(input) {
    let budget = Number(input[0]);
    let season = input[1];
    let place = "";
    let region = "";
    let sum = 0;

    switch (season) {
        case "summer":
            place = "Camp";
            if (budget <= 100) {
                sum = 0.3 * budget;
            } else if (budget > 100 && budget <= 1000) {
                sum = 0.4 * budget;
            }
            break;

        case "winter":
            place = "Hotel";
            if (budget <= 100) {
                sum = 0.7 * budget;
            } else if (budget > 100 && budget <= 1000) {
                sum = 0.8 * budget;
            }
            break;
    }
    if (budget <= 100) {
        region = "Bulgaria";
    } else if (budget > 100 && budget <= 1000) {
        region = "Balkans";
    } else {
        place = "Hotel";
        region = "Europe";
        sum = 0.9 * budget;
    }
    console.log(`Somewhere in ${region}`);
    console.log(`${place} - ${sum.toFixed(2)}`);
}

Решение с if-else леко тарикатската:

function journey(input) {
    let budget = Number(input[0]);
    let season = input[1];
    let place = "Hotel";
    let region = "Europe";

    if (budget <= 100) {
        region = "Bulgaria";
        if (season === "summer") {
            place = "Camp";
            budget *= 0.3;
        } else {
            budget *= 0.7;
        }
    } else if (budget > 100 && budget <= 1000) {
        region = "Balkans";
        if (season === "summer") {
            place = "Camp";
            budget *= 0.4;
        } else {
            budget *= 0.8;
        }
    } else {
        budget *= 0.9;
    }
    console.log(`Somewhere in ${region}`);
    console.log(`${place} - ${budget.toFixed(2)}`);
}

Pешение с тернарен оператор:

function journey(input) {
    let budget = Number(input[0]);
    let season = input[1];
    let place = season == "summer" && budget <= 1000 ? "Camp" : "Hotel";
    let region = budget <= 100 ? "Bulgaria" : budget > 1000 ? "Europe" : "Balkans";

    budget *= budget <= 100 ? (season == "summer" ? 0.3 : 0.7) :
        budget > 100 && budget <= 1000 ? (season == "summer" ? 0.4 : 0.8) : 0.9;

    console.log(`Somewhere in ${region}`);
    console.log(`${place} - ${budget.toFixed(2)}`);
}