OK, I'll change my question. I have a variable named "number". Until some point it doesn't have any value but I want to assign a value for it. User will set that value. This should be program for power of 2 but not only. I want to have a chart like he writes 5 so it will be Pof2 for 5, 6, 7, etc. Problem is, that it always starts from 0 and not from user's value.