What is the 2nd person singular in French?

The 2nd person singular in French is "tu". It's used to address one person informally, similar to "you" in English when speaking to a friend, family member, or someone you know well.

Here are some examples:

* Tu parles français? (Do you speak French?)

* Tu es gentil. (You are kind.)

* Tu vas bien? (Are you doing well?)

It's important to note that the formal "vous" is also used in French, and it's considered more polite when addressing someone you don't know well, someone older than you, or someone in a position of authority.