When I run this code within the range of 5 it works fine.
If I run it outside of that range, it fails with the following:
Traceback (most recent call last): File "python", line 28, in <module> IndexError: list index out of range
Out of interest, line 28 is:
board[guess_row][guess_col] = "X"
I thought it would say "That's not even in our ocean!"
from random import randint board =  for x in range(0, 5): board.append(["O"] * 5) def print_board(board): for row in board: print " ".join(row) print_board(board) def random_row(board): return randint(0, len(board) - 1) def random_col(board): return randint(0, len(board) - 1) ship_row = random_row(board) ship_col = random_col(board) guess_row = int(raw_input("Guess Row:")) guess_col = int(raw_input("Guess Col:")) print ship_row print ship_col board[guess_row][guess_col] = "X" # Write your code below! if guess_row == ship_row and guess_col == ship_col: print "Congratulations! You sank my battleship!" print_board(board) else: if guess_row not in range(5) or guess_col not in range(5): print "That's not even in our ocean!" else: print "You missed my battleship!" print_board(board)