Help me find what causes undefined to show up in console. Rock, paper, scissors project

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1

Why does my console show undefined after everything else in the code. The code works as it should, but it bugs me obviously to see that. I just cant find the reason it happens.

Heres my code:

// Function for the users input
function getUserChoice(userInput) {
    userInput = userInput.toLowerCase();
    if (userInput === 'rock' || userInput === 'paper' || userInput === 'scissors' || userInput === 'bomb') {
        return userInput;
    } else {
        console.log('Error!');
    }
}

// Function for randomly choosing the computers response
let getComputerChoice = () => {
    let randonNumber = Math.floor(Math.random() * 3);
    if ( randonNumber === 1) {
        return 'rock';
    } else if (randonNumber === 2) {
        return 'paper';
    } else {
        return 'scissors';
    } 
}

// Function to determine the winner using conditionals
let determineWinner = (getUserChoice, getComputerChoice) => {
    if (getUserChoice === getComputerChoice) {
        return 'Game was a tie';
    } if (getUserChoice === 'rock') {
        if (getComputerChoice === 'paper') {
            return 'Computer won';
        } else {
            return 'User won';
        }
    } if (getUserChoice === 'paper') {
        if (getComputerChoice === 'scissors') {
            return 'Computer won';
        } else {
            return 'User won';
        }
    } if (getUserChoice === 'scissors') {
        if (getComputerChoice === 'rock') {
            return 'Computer won';
        } else {
            return 'User won'
        }
    } if (getUserChoice === 'bomb') {
        if (getComputerChoice === 'rock' || getComputerChoice === 'paper' || getComputerChoice === 'scissors') {
            return 'User won! BOMB!!!'
        }
    }
}

// function to play the game. Input your choice inside the parameter of the function getUserChoice
function playgame () {
    let userChoice = getUserChoice('paper');
    let computerChoice = getComputerChoice();
    console.log('You threw: ' + userChoice);
    console.log('The computer threw: ' + computerChoice);
    console.log(determineWinner(userChoice, computerChoice));
}

// Logs the game to the console.
console.log(playgame());
2

Since you aren’t explicitly returning some value from the playgame function, so undefined is implicitly returned by the function which is then logged by the console.log statement,

// You wrote:
console.log(playgame());

// Change it to:
playgame();
1 Like
3

Ooh, i get it! Thanks for the help!

1 Like