paper scissors rock python game

Question

This is my attempt to create paper, rock and scissors game There seems to be an error with while loop, "roundNum is not defined", please help?

import random
options = ['rock','paper','scissors']

def game(rounds):
  roundNum = 1
  playerScore = 0
  computerScore = 0

while roundNum <= rounds:
  print('Round Number '+ str(roundNum))
  Player = input('Please choose rock, paper or scissors')
  computer =  options[random.randint(0,2)]
  print(computer)

Answer 1

Make sure your indentation is correct.

import random
options = ['rock','paper','scissors']

def game(rounds):
  roundNum = 1
  playerScore = 0
  computerScore = 0

  while roundNum <= rounds:
      print('Round Number '+ str(roundNum))
      Player = input('Please choose rock, paper or scissors')
      computer =  options[random.randint(0,2)]
      print(computer)

Answer 2

The issue is with the indentation of while loop.

As function game and while are at same level any object declared inside the game function will be out of scope/unreachable for while loop.

A simple tab will resolve the issue in this case as follow:

import random
options = ['rock','paper','scissors']

def game(rounds):
    roundNum = 1
    playerScore = 0
    computerScore = 0

    while roundNum <= rounds:
      print('Round Number '+ str(roundNum))
      Player = input('Please choose rock, paper or scissors')
      computer =  options[random.randint(0,2)]
      print(computer)

Answer 3

The reason you are getting the error RoundNum is not defined is because you are defining variables inside of a function, this means that you will have to call the function game() to define the three variables roundNum , playerScore and computerScore . To solve this, we remove the game() function and define the three variables in the main script like this:

import random

options = ['rock', 'paper', 'scissors']

roundNum = 1 # Defines the roundNum variable
playerScore = 0
computerScore = 0

def game(rounds):
    while roundNum <= rounds:
        print('Round Number ' + str(roundNum)
        Option = input('Please choose rock, paper, or scissors > ')
        Computer = options[random.randint(0, 2)]