Why does the Python round() method output varying results for me?

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The Python round() function output varying results due to its default rounding mode. By default, it uses the “Round half to even” strategy or the banker’s rounding, which means that it rounds up to the nearest even number if the number being rounded is exactly between two numbers.

For example, round(2.5) = 2 round(3.5) = 4

If you want to specify a different rounding mode, you can use the decimal module instead of the built-in round() function. The decimal module provides more control over rounding, and you can specify the rounding modes you want to use.