Je suis étudiant(e).
* Je suis means "I am"
* étudiant means "student" (masculine)
* étudiante means "student" (feminine)
You use étudiant if you are male, and étudiante if you are female.
Here are some other ways to say "I am a student" in French:
* J'étudie. (I study)
* Je suis élève. (I am a pupil/student)
* Je suis en cours. (I am in class)
The best option for you will depend on the specific context.