* "Allons-y" is the correct and more formal way to say "let's go" in French. It's a more emphatic and enthusiastic way to express the idea of moving forward together.
* "Allons" is a less common and informal way to say "let's go." It's usually used in more casual settings and can sound a little bit abrupt.
Here's a simple guide:
* Formal situations: "Allons-y"
* Informal situations: "Allons"
Examples:
* "Allons-y! C'est l'heure de partir." (Let's go! It's time to leave.) (Formal)
* "Allons, on va se faire un café." (Let's go, we'll get a coffee.) (Informal)
Ultimately, both "Allons-y" and "Allons" can be used to express the idea of "let's go," but "Allons-y" is the more common and grammatically correct choice.