# Questions

#1

the code runs smoothly, but i just have a question:
why do you not have to def the variable for turn and it will be assumed to be zero?

thanks!

``````from random import randint

board = []

for x in range(5):
board.append(["O"] * 5)

def print_board(board):
for row in board:
print " ".join(row)

print "Let's play Battleship!"
print_board(board)

def random_row(board):
return randint(0, len(board) - 1)

def random_col(board):
return randint(0, len(board[0]) - 1)

ship_row = random_row(board)
ship_col = random_col(board)
print ship_row
print ship_col

# Everything from here on should go in your for loop!
# Be sure to indent four spaces!
for turn in range(4):
guess_row = int(raw_input("Guess Row:"))
guess_col = int(raw_input("Guess Col:"))

if guess_row == ship_row and guess_col == ship_col:
print "Congratulations! You sunk my battleship!"
break
else:
if (guess_row < 0 or guess_row > 4) or (guess_col < 0 or guess_col > 4):
print "Oops, that's not even in the ocean."
elif (board[guess_row][guess_col] == "X"):
print "You guessed that one already."
else:
print "You missed my battleship!"
board[guess_row][guess_col] = "X"
if turn == 3:
print "Game Over"
# Print (turn + 1) here!
print "Turn", turn + 1
print_board(board)``````

#2

you mean here:

``for turn in range(4):``

?

`turn` gets defined in the loop, `range()` will produce a list and assign the values in list to `range` in order

#3

Yep but how does it know that turn = 0 initially? because it is not defined as such anywhere

#4

`range()` produces a list, the first value of which is `0`, which gets assigned to `turn` in the first run of the loop

#5

oh okay i got it thanks!

#6

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