How do you say its true in french?

"C'est vrai" is the most common and straightforward way to say "it's true" in French.

Here are some other options, depending on the context:

* C'est exact: This is more formal and means "it's exact."

* C'est correct: This is also formal and means "it's correct."

* C'est bien: This is less formal and means "it's right" or "that's right."

* Effectivement: This means "indeed" or "actually" and can be used to emphasize the truth of something.

* En effet: This is similar to "effectivement" and means "indeed" or "in fact."

The best choice depends on the specific situation and the level of formality you want to convey.