increment operator

Question

Cam someone explain me what does this "+=" do ?

Answer 1

It's equivalent to adding the current value of whatevers on the left side of the equal sign by whatever is on the right side of the equal sign.
Example/
int x = 5;
x += 10;
This is equivalent to writing:
int x = 5;
x = x + (10);
So x will become 15 in both cases.

Answer 2

x+=y means x=x+y;
x-=y means x=x-y;
x*=y means x=x*y;
x/=y means x=x/y;

Answer 3

you're welcome

Answer 4

tanks