How do you write hello how are in french?

The phrase "hello how are you" in French can be expressed in a few different ways, depending on the level of formality and the context:

Formal:

* Bonjour, comment allez-vous ? (This is the most formal and polite way to say hello and ask how someone is.)

Informal:

* Salut, ça va ? (This is a casual and friendly greeting, literally meaning "Hi, how's it going?")

* Coucou, comment vas-tu ? (This is even more informal and friendly, typically used with someone you know well.)

You can also use:

* Bonjour, comment allez-vous aujourd'hui ? (This is more formal than "Bonjour, comment allez-vous?" and emphasizes the current day.)

* Salut, comment tu vas ? (This is the most informal way to ask "how are you" in French, but it's only appropriate with friends or family.)

Remember that the best way to say "hello how are you" in French depends on the specific situation and the person you are talking to.