ではありません　ｖｓ　じゃいないです
whats the difference? when are they used? what is more common? etc...

Question

Answer

Please check your previous question.
https://www.italki.com/question/484200

These are  similar questions other people said.
【Negation with ではありません vs. じゃない - Japanese Language Stack ...】https://japanese.stackexchange.com/questions/12846/negation-with-%E3%81%A7%E3%81%AF%E3%81%82%E3%82%8A%E3%81%BE%E3%81%9B%E3%82%93-vs-%E3%81%98%E3%82%83%E3%81%AA%E3%81%84
【「じゃないです」vs「じゃありません」 - 日本語を学ぶ - italkiの回答】
https://www.italki.com/question/238525?hl=ja

Answer

じゃいないです。は間違いです。じゃないです。口語的な表現ですので、正式な文章では使わないほうがよいと思います。

Answer

じゃいないです

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