N3
んだって
I heard that, He or She said that
サクラちゃん来年結婚するんだって。うらやましいね。
I heard that Sakura-chan is going to get married next year. I am jealous, aren't you?
Explanation
「んだって」 has 2 uses
1I heard that
Casually passes on something you heard, flat tone at the end: 「田中さん、来月結婚するんだって」.
トムは、また元カノと付き合っているんだって。
I heard Tom is back with his ex-girlfriend.
サクラちゃん来年結婚するんだって。うらやましいね。
I heard that Sakura-chan is going to get married next year. I am jealous, aren't you?
2Is it true that…?
With rising tone, asks again in surprise after hearing unexpected news: 「明日テストがあるんだって?」
えっ、山本さん、会社を辞めるんだって?
What, Yamamoto is quitting the company?
来週、また試験があるんだって?本当?
There's another exam next week? Really?
Mixed up with
「~んだって」 is friendly speech, like sharing gossip.
「~そうだ」 is the standard way to report hearsay.
「~ということだ」 and 「~とのことだ」 are formal, used in writing and business e-mails.
Do not drop 「な」 after a noun: 「病気なんだって」 (I heard she's ill).