Hi,

You can not join IAF directly after passing class 12th. The minimum requirement is graduation so appear for AFCAT exam.

Eligibility criteria for AFCAT is as follows-

• Age: Candidates aspiring to join the Air force through AFCAT exams must be between the age of 20 to 24 years.
• Nationality: Indian
• Marital status: Single.
• Qualification: Must be a graduate from a recognised institution with at least 60% marks or a similar degree with a minimum of 60% marks or equivalent. Final year students are also eligible to apply for the exams
• Those who have cleared section A and B examination of Associate Membership of Institute Engineers or Aeronautical Society of India can also apply

Hope you find this helpful.