Please explain me about Prefix and Postfix

Question

exp.
x=10
y=6
y=x++
cout<<++y;

and, wht about 3 or more variable?
many thanks.

Answer 1

Prefix : = ++x;
postfix = x++;
prefix adds the value of the variable by 1 before processing the line of code.
Postfix processes the line of code before adding the value of the variable by 1.
Example :
int x = 10;
int y = ++x; // x and y becomes 11.
int z = y++; // y becomes 12 , z becomes 11.

Answer 2

many thanks, K2