Please explain in detail prefix and postfix

Answer 1

https://www.sololearn.com/discuss/69892/?ref=app

and many others...

Answer 2

prefix / postfix:
pre.... means before
post... means after

for example (underscore is used as pre/post fix):
___WordWithPrefix
WordWithPostFix___

in programming you often touch these description with the increment/decrement function for an integer
int i = 0;
++i => Prefix increment
i++ => Postfix increment

The first one is incremente before any other action with this variable.
The second one will be incremented after any action with this variable