# Not again

#1

i can't understand it ,why it used#elif board[guess_row][guess_col] = "X"# that thing ,what's use?

``````Replace this line with your code.
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[0]) - 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

# Write your code below!
if guess_row == ship_row and guess_col == ship_col:
print "Congratulations! You sank my battleship!"
else:
if guess_row not in range(5) or guess_row not in range(5):
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"
print print_board(board)``````

#2

It simply calls to guess_row and guess_col from board, and checks if there is already X.

#3

Here is the full code for anybody who needs it!
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[0]) - 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

# Write your code below!

if guess_row == ship_row:
if guess_col == ship_col:
board[guess_row][guess_col] = "X"
print "Congratulations! You sank my battleship!"
else:

``````if guess_row not in range(5) or guess_col not in range(5):
print "Oops, that's not even in the ocean."
elif [guess_row][guess_col] == "X":
"You guessed that one already."``````

Hope this helps:grin:

#4

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