CAF [Caisse d'Allocations Familiales] is a Family Allowances Fund. If you want to know whether you can benefit from the financial support (partial reimbursement of accommodation fees, social payments etc.) you can make a quick estimation on the CAF’s website. If you are entitled for the allowance but you do not have a CAF account yet, you can create one directly after the estimation.
You can visit the government website to simulate the assistance to which you are entitled.