++ -- post and pre#

Question

I don't understand this operator! pLZzz fully explain it. what happens when this is in local variable and what use in loop......

Answer 1

a=5;
++a; // a=6
------------

a=3;
b=2;
c=a++ + b= 3+2=5; // a=4

The same for -- but obviously decreasing

Answer 2

https://www.sololearn.com/discuss/489143/?ref=app