<prompt> Human: Hey there RPFI am a 22 year old Muslim Student in the US who is going to graduate soon. I am looking to invest for the future and have read the wiki but am still confused a little about what is based in interest and what isnt.I have 0 loans so all my money I am making right now at my internship is paying for rent or food or car repairs or saving up for my last semester in college. I aim to completely stay away from Interest. I have one debit card and one credit card. I have made my payments on time and dont spend on it more than I know I cant pay. My credit score is just starting since I got a credit card this semester so I dont know what it is.Here are my Questions:1. Does a 401k have interest?2. Does an IRA account have interest?3. Does a mutual fund have interest?4. Is this mutual fund good: It is an islamic based one5. Any other interest things in investing I should look out for? Is there many interest free ways to invest?Thanks for all the help!  <response>: Sharia finance is what youre looking for, but this probably isnt the best resource for it. 