How to pass the value of variables from one function to another in JS?

Question

JavaScript

Hello everyone, I started learning js and got to functions. There is such a problem. I'm stuck on task 3 and can't figure out how to do it... Please explain

const btn = document.getElementById("play");
const player1 = document.getElementById("player1");
const player2 = document.getElementById("player2");




function getPlayerResult() {
    let result = Math.floor((Math.random() * 3) + 1);

    let num1 = result;
    let num2 = result;


    
    function getElemById() {

        if (result == 1) {
            result = 'Камень';
        } else if (result == 2) {
            result = 'Ножницы';
        } else if (result == 3) {
            result = 'Бумага';
        } 
    
    }

    function determineWinner(count1, count2) {
       
    }
     

    getElemById();
    determineWinner(num1, num2);
    
    return result;
}


function runGame() {
    
    player1.innerHTML = getPlayerResult();
    player2.innerHTML = getPlayerResult();
    
    
}

btn.addEventListener("click", runGame);

Answer 1

const player1 = document.getElementById('player1');
const player2 = document.getElementById('player2');

const resultElem = document.getElementById('result');

const btn = document.getElementById('play');
btn.addEventListener('click', runGame);

function getPlayerResult() {
    const result = Math.floor(3 * Math.random());
    return result;
}

function getNameById(id) {
    let name = 'Error';
    switch (id) {
        case 0:
            result = 'Rock';
            break;
        case 1:
            result = 'Scissors';
            break;
        case 2:
            result = 'Paper';
            break;
    } 
    return name;
}

function determineWinner(idFirst, idSecond) {
    const result = (idSecond - idFirst + 3) % 3;
    return result;
}

function getMessageByResult(result) {
    let message = 'Error';
    switch (id) {
        case 0:
            message = 'The game ended in a draw.';
            break;
        case 1:
            message = 'The first player won.';
            break;
        case 2:
            message = 'The second player won.';
            break;
    } 
    return message;
}

function runGame() {
    const result1 = getPlayerResult();
    const result2 = getPlayerResult();

    player1.innerHTML = getNameById(result1);
    player2.innerHTML = getNameById(result2);

    const winner = determineWinner(result1, result2);
    resultElem.innerHTML = getMessageByResult(winner);
}

Answer 2

1. Subtract another number from one (i.e. subtract the result of the second player from the result of the first player).
   
2. If it turned out less than zero, then add three. Further:
   • 0 = draw
     
   • 1 = won first
     
   • 2 = second won