I think there is no such thing as a loan that does not have interest because in today's era we work with interest in which we charge so much interest and tax on even a small amount which is very wrong because even if there is something to do and you are successful then it is very wrong to take or pay tax and interest.  If we take something and stop it, it also comes in interest because enough information has been found about it, due to which there is a lot of work to do something else which is good but does not have tax and interest, which will continue to earn good.