Game code is broken down into four parts: 1. Get user’s choice. 2. Get computer’s choice. 3. Compare two choices and determine the winner. 4. Start the program and display the results

Rock, Paper, or Scissors JavaScript.js

/*
Game code is broken down into four parts:
1. Get user’s choice.
2. Get computer’s choice.
3. Compare two choices and determine the winner.
4. Start the program and display the results 
*/
//Const arrow function
/*The user should be able to choose ‘rock’, ‘paper’, or ‘scissors’ when the game starts*/
const getUserChoice = userInput => {
  userInput = userInput.toLowerCase();
  //User can pass in a parameter, such as ‘Rock’ or ‘rock’ with different capitalizations
  //Code below makes sure that the user typed a valid choice: ‘rock’, ‘paper’, or ‘scissors’.
  if(userInput === 'rock' || userInput === 'paper' || userInput === 'scissors'){
    return userInput;
  }else{
    console.log('Error!');
  }
}

/*The lines below are for testing purposes Tests the function by calling it with valid and invalid inputs, and printing the results to the console.*/
//console.log(getUserChoice('PAPER'));Prints paper
//console.log(getUserChoice('fork'));Prints error!

//Function for computer's choice
const getComputerChoice = () => {
  var randomNumber = Math.floor(Math.random()*3);//Random number is for 3 choices between 0 and 2
  switch(randomNumber){
  case 0:
    return'rock';
  case 1:
    return'paper';
  case 3:
    return'scissors';
}
}

/*Below is code that test the function by calling it multiple times and printing the results to the console.*/
//console.log(getComputerChoice());
//console.log(getComputerChoice());
//console.log(getComputerChoice());

//This function determines the winner based on user and computer choice
const determineWinner = (userChoice,computerChoice) => {
  if( userChoice === computerChoice){
    return 'The game was a tie!';
  }
  if(userChoice === 'rock'){
    if(computerChoice === 'paper'){
      return 'Computer won!';
    }else{
      return 'User won!';
    }
  }

  if(userChoice === 'paper'){
      if(computerChoice === 'scissors' || 'rock'){
        return 'Computer won!';
      }else{
        return 'User won!';
      }
  }
  if(userChoice === 'scissors'){
    if(computerChoice === 'rock' || 'paper'){
      return 'Computer won!'; 
    }else{
      return 'User won!';
    }
  }
}
//console.log(determineWinner('paper','scissors')); To test function

//Function to start the game
function playGame(){
  var userChoice = getUserChoice('rock');
  var computerChoice = getComputerChoice('scissors');
  console.log(userChoice,computerChoice);//Choices made
  console.log(determineWinner(userChoice,computerChoice));//Determines winner
}
console.log(playGame());