Tic-tac-toe in Python

Last updated Dec. 11, 2022

Tic-Tac-Toe Implemented in Python

Tic-tac-toe, also known as noughts and crosses, is a simple two-player game played on a 3x3 grid. The goal of the game is to be the first player to place three of their markers in a horizontal, vertical, or diagonal row. The game is typically played using paper and pencil, but it can also be implemented in a programming language such as Python. It is a game of strategy and skill, and it can be a fun way to pass the time. Here is an example of how you might implement a simple tic-tac-toe game in Python:

# Board is represented as a list of strings, where each string represents a row on the board
board = [" ", " ", " ",
         " ", " ", " ",
         " ", " ", " "]

# Function to print the current state of the board
def print_board():
    print(board[0] + " | " + board[1] + " | " + board[2])
    print("---------")
    print(board[3] + " | " + board[4] + " | " + board[5])
    print("---------")
    print(board[6] + " | " + board[7] + " | " + board[8])

# Function to check if the game has been won
def check_win():
    # Check horizontal wins
    if board[0] == board[1] == board[2] != " ":
        return True
    if board[3] == board[4] == board[5] != " ":
        return True
    if board[6] == board[7] == board[8] != " ":
        return True

    # Check vertical wins
    if board[0] == board[3] == board[6] != " ":
        return True
    if board[1] == board[4] == board[7] != " ":
        return True
    if board[2] == board[5] == board[8] != " ":
        return True

    # Check diagonal wins
    if board[0] == board[4] == board[8] != " ":
        return True
    if board[2] == board[4] == board[6] != " ":
        return True

    return False

# Function to check if the game has ended in a draw
def check_draw():
    for i in range(9):
        if board[i] == " ":
            return False
    return True

# Main game loop
while True:
    # Print the current state of the board
    print_board()

    # Get player X's move
    x = int(input("Player X: Choose a position (1-9): "))
    board[x - 1] = "X"

    # Check if player X has won
    if check_win():
        print_board()
        print("Player X wins!")
        break

    # Check if the game has ended in a draw
    if check_draw():
        print_board()
        print("It's a draw!")
        break

    # Print the current state of the board
    print_board()

    # Get player O's move
    o = int(input("Player O: Choose a position (1-9): "))
    board[o - 1] = "O"

    # Check if player 0 has won
    if check_win():
        print_board()
        print("Player O wins!")
        break

    # Check if the game has ended in a draw
    if check_draw():
        print_board()
        print("It's a draw!")
        break