what is function of ++ after or before an integer

Question

what is function of ++ after or before an integer in code

Answer 1

it increments the value of ur variable by 1. if x=3 and x++ gives 4. ++x is pre increment and x++ is post increment.

Answer 2

int a=3,b;
b=a++ then cout<<b----->output is 3 but
b=++athen cout<<b------>output is 4