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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Addition/subtraction clear sign from signed 0j","articleBody":"Complex numbers with signed zero as an imaginary part could be created from a string or with two-argument form of the complex() constructor: \r\n```python\r\n\u003e\u003e\u003e complex(1.0, -0.0)\r\n(1-0j)\r\n\u003e\u003e\u003e complex('(1-0j)')\r\n(1-0j)\r\n```\r\nIt's also possible to create pure imaginary numbers with signed zero:\r\n```python\r\n\u003e\u003e\u003e -0j  # or it should be complex(0.0,-0.0)?\r\n(-0-0j)\r\n```\r\nBut it's impossible to create a complex number with signed zero as an imaginary part if addition/subtraction is used (i.e. adding a real number and an imaginary number):\r\n```python\r\n\u003e\u003e\u003e 1-0j  # should be complex(1.0,-0.0)\r\n(1+0j)\r\n\u003e\u003e\u003e 1+(-0j)  # ditto here\r\n(1+0j)\r\n\u003e\u003e\u003e 0-0j  # should be complex(0.0,-0.0)\r\n0j\r\n```\r\n","author":{"url":"https://github.com/skirpichev","@type":"Person","name":"skirpichev"},"datePublished":"2023-08-11T03:27:06.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/107854/cpython/issues/107854"}