CHALLENGE: The code editor contains three versions of a program that creates a chessboard.

• All three programs have the same outcome: they create an 8 square x 8 square chessboard!
• Which program is the least efficient? Which program(s) do you think are the most efficient or most readable?
• Look at the code. Can you identify how each program makes the rows alternate colors?
• Play with the code! Use print() to help figure out the values of each variable as the program runs.

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