Informal:
* Pas mal: This is the most common and versatile way to say "not bad." It's informal and can be used in a variety of situations.
* Pas trop mal: This is a slightly more emphatic way to say "not bad." It conveys a bit more positivity than "pas mal."
* Sympa: This is a more casual way to say "not bad." It means "nice" or "cool."
* Bien: This literally means "good," but can be used to mean "not bad" in informal situations.
Formal:
* Pas mauvais: This is the formal equivalent of "pas mal." It's more appropriate for professional or academic settings.
* Correct: This means "correct" and can be used to indicate something is acceptable or "not bad."
* Acceptable: This is a more formal way to say "not bad." It implies that something is satisfactory.
Examples:
* "Le film était pas mal." (The movie was not bad.)
* "Le repas était pas trop mal." (The meal was not bad.)
* "C'est sympa comme cadeau." (That's a nice gift.)
* "Votre travail est correct." (Your work is acceptable.)
* "La situation est acceptable." (The situation is acceptable.)
The best way to choose the right phrase depends on the situation and your relationship with the person you're talking to.