How does ++ effect a variable such as var++?

[JiWiz]

Hello,

I'm currently on the loops page of the tutorial on this website and i'm wondering what does the syntax ++ mean at the end of a variable name on the end of a loop.

// The loop goes while x < 10, and x increases by one every loop
for ( int x = 0; x < 10; x++ ) {

How does ++ on the end of the variable name effect the variable or what is this supposed to do? is this also an operator of some sort? "++".

Cheers Josh.

[MacGyver]

x++ in that case is equivalent to x = x + 1.

In context of being alone, like as you have it in a for loop, ++x and x++ are the same. In context of being used in an expression ++x increments the value of x immediately. x++, on the other hand, increments the value of x, but the original value is used in its place:

Case in point:

int x = 3;
std::cout << "x = " << x++ << std::endl;

Printed value will be 3, however, x itself will be 4.

int x = 3;
std::cout << "x = " << ++x << std::endl;

Printed value will match x, which will be 4.