On 13/09/2017 14:25, Andrej Viktorovich wrote: > Hello, > > I have done mistake while trying to increment int > > i=1 > i=+ > > this left i unchangeable and I got no error. But what =+ means at all? Did you mean i=+1 ? This means i is set to the value +1. Usually just written 1. Try: i=88 i=+1 and see if i now changes. -- bartc