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nextLine()ではまったワナ

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nextLine()すると勝手に空文字入力される

###こたえ
https://teratail.com/questions/106725

どうやら、sc.nextInt() のときの改行が残っているらしく、sc.nextLine()が実行されたタイミングで、その改行がユーザーの入力よりも先に入力→Enter実行されてしまうみたい。

sc.next()を使うとその症状は起こらない。

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