Formal:
* Prazer em conhecê-lo/conhecê-la. (This is the most formal and polite way to say it, literally meaning "pleasure to meet you").
* É um prazer conhecê-lo/conhecê-la. (This is another formal option, similar in meaning to the previous one).
Informal:
* Prazer em te conhecer. (This is the most common way to say it in informal situations, meaning "nice to meet you").
* É bom te conhecer. (This is a bit more casual, meaning "it's good to meet you").
* Legal te conhecer! (This is even more casual, meaning "cool to meet you!").
Important note:
* "Você" is used in both formal and informal situations, while "tu" and "você" are used in informal situations depending on the region.
* "O/a" (masculine/feminine) should be used with the formal forms, while "te" (for both genders) is used in informal situations.
Example:
* Formal: "Prazer em conhecê-la, Maria." (Nice to meet you, Maria.)
* Informal: "Prazer em te conhecer, João." (Nice to meet you, João.)
Remember to always choose the appropriate level of formality based on the situation and your relationship with the person you're speaking to.