Learn Spanish (Latin America): ¿Cuál es tu nombre?

In English, we say "What is your name?", but in Spanish, asking ¿qué es tu nombre? sounds like you are asking for the dictionary definition of the word "name." When asking for a specific detail like a name, phone number, or date using the verb es (is), Spanish uses cuál (which). It is basically asking "Which [of all the names in the world] is your name?"

I learned that "What is your name?" is ¿Cómo te llamas?. Can I use either one?

Yes, both mean the same thing in practice! ¿Cómo te llamas? (literally "How do you call yourself?") is the most common and conversational way to ask. ¿Cuál es tu nombre? is also perfectly natural but sounds slightly more formal, like something you might hear at a doctor's office, on a form, or during a formal introduction.

Why doesn't the word tu have an accent mark over the 'u' here?

In Spanish, tu without an accent mark means "your" (as in tu nombre meaning "your name"). The word tú with an accent mark means "you" (as in tú eres, meaning "you are"). The accent mark is just a visual tool used in writing to tell these two identical-sounding words apart!

Does cuál change if I am asking for more than one thing?