Can dietary fiber make you lose weight without exercise?

I dont exercise as much as I used to, let alone I have not in the past 5 days. Im taking about 20-24 grams of dietary fiber a day. I seem to be losing weight without much effort. Could it be that this is all I needed to lose weight? I know very well about vitamins, psychical fitness etc. A serious question, I hope this information will benefit others also whos bodies are just different.