Example 2

// function that simulates loot drops in RPG games:
function getRndLoot() {
    const lootTable = [
        {item: "health potion", chance: 0.2},
        {item: "speed potion", chance: 1.2},
        {item: "rare coin", chance: 1.1},
    ];
    const randomNum = Math.random();
    var selectedItem = null;
    for(const loot of lootTable) {
        if(randomNum < loot.chance) {
            selectedItem = loot.item;
            break;
        }
    }
    return selectedItem || `no loot`;
}
const droppedItem = getRndLoot();
console.log(droppedItem)

// function that tracks quests completed by players:
const completedQuests = [];
function completeQuest(questName) {
    if(!completedQuests.includes(questName)) {
        completedQuests.push(questName);
    }
}
completeQuest("Find Darkost in the Armageddon");
completeQuest("Retrieve the crown from the forgotten dungeon");
console.log(`Completed quests: ${completedQuests.join(', ')}`);

// function that simulates combat system:
function simulateCombat(playerHP, enemyHP) {
    while (playerHP > 0 && enemyHP > 0) {
        const playerDamage = Math.floor(Math.random() * 20) + 1;
        enemyHP -= playerDamage;
        const enemyDamage =
        Math.floor(Math.random() * 8) + 1;
        playerHP -= enemyDamage;
    }
    if(playerHP <= 0) {
        console.log("You DIED");
    } else {
        console.log("You have WON");
    }
}
const playerHealth = 100;
const enemyHealth = 80;
simulateCombat(playerHealth, enemyHealth);

//function that generates random loot from treasure chests:
function openChest() {
    const possibleLoot = ["gold", "medkit", "magic wand", "gemstone"];
    const randomLoot = Math.floor(Math.random() * possibleLoot.length);
    return possibleLoot[randomLoot];
}
const foundLoot = openChest();
console.log(foundLoot);

// function that handles skill leveling
const playerSkills = {
    attack: 1,
    defense: 1,
    magic: 1,
};
function levelUpSkill(skill) {
    playerSkills[skill] += 1
}
levelUpSkill("attack");
console.log(playerSkills.attack);