can anyone explain what an in place operator is im really confused

Answer 1

in place operators should help to shorten your code.
You can write x += 2 instead of x = x + 2.
+= is the in place operator, here.

Answer 2

thanks

Answer 3

in place operators are shot hand notations ,they will help to represent the expressions in short form like
a[i]=a[i]+8
to
a[i]+=8