rock-paper-scissors-game.swift

func getUserChoice(userInput: String) -> String {
  if userInput == "rock" || userInput == "paper" || userInput == "scissors" {
    return userInput
  }
  else {
    return ("You can only enter rock, paper, or scissors. Try again.")
  }
}

func getComputerChoice() -> String {
  let randomNumber = Int.random(in: 0...2)
  switch randomNumber {
    case 0:
    return "rock"
    case 1:
    return "paper"
    case 2:
    return "scissors"
    default:
    return "Something went wrong"
  }
}

func determineWinner(_ userChoice: String, _ compChoice: String) -> String {
  
  var decision: String = "It's a tie"

  switch userChoice {
    case "rock":
    if compChoice == "paper" {
      decision = "The computer won"
    }
    else if compChoice == "scissors" {
      decision = "The user won"
    }

    case "paper":
    if compChoice == "rock" {
      decision = "The user won"
    }
    else if compChoice == "scissors" {
      decision = "The computer won"
    }

    case "scissors":
    if compChoice == "rock" {
      decision = "The computer won"
    }
    else if compChoice == "paper" {
      decision = "The user won"
  }

    default: 
    print("Something went wrong")
}
return decision
}

let userChoice = getUserChoice(userInput: "paper")

let compChoice = getComputerChoice()

print("You threw \(userChoice)")
print("The computer threw \(compChoice)")
print(determineWinner(userChoice, compChoice))