Python Quiz: What is the Output?

@PythonPr Answer: 18 The 90% beginners trap: x += x + 4 isn't x += 9! › x = 7 (after +2) › x += x + 4 means x = x + (x + 4) › x = 7 + 7 + 4 = 18 For beginners: += expands first, then evaluates both sides with the current x.

@PythonPr 18

@PythonPr 11

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@PythonPr Thanks! This is reinforced learning! I just became more confident into python even though I got this wrong.

@PythonPr 18

@PythonPr 18

@PythonPr x = 7 + 7 + 4 = 18

@PythonPr 18

@PythonPr 22

@PythonPr 18

@PythonPr Difficult

@PythonPr x = 5 y = x → y = 5 x = x + 2 → x = 7 x += x + 4 → x = 7 + (7 + 4) = 18

@PythonPr Output : 18 ... .@PythonPr

@PythonPr answer is 18.

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@PythonPr Output is 18.