What this snippet does
While variables can change types, mixing incompatible types in operations still raises runtime TypeErrors.
Expected output
TypeError: unsupported operand type(s) for +: 'int' and 'str'
Why practise typing this
Typing variables & types code builds muscle memory for the symbols and indentation Python uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
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