The difference between ++Var and Var++
increment, java, operators, post-increment, pre-increment
Solution
tldr;
Although both `var++` and `++var` increment the variable they are applied to, the result returned by `var++` is the value of the variable before incrementing, whereas the result returned by `++var` is the value of the variable after the increment is applied.
Further Explanation
When `++var` or `var++` form a complete statement (as in your examples) there is no difference between the two. For example the following
int x = 6;
++x;
assert x == 7;
is identical to
int x = 6;
x++;
assert x == 7;
However, when `++var` or `var++` are used as part of a larger statement, the two may not be equivalent. For example, the following assertion passes
int x = 6;
assert ++x == 7;
whereas this one fails
int x = 6;
assert x++ == 7;
Although both `var++` and `++var` increment the variable they are applied to, the result returned by `var++` is the value of the variable before incrementing, whereas the result returned by `++var` is the value of the variable after the increment is applied.
When used in a `for` loop, there is no difference between the two because the incrementation of the variable does not form part of a larger statement. It may not appear this way, because there is other code on the same line of the source file. But if you look closely, you'll see there is a `;` immediately before the increment and nothing afterwards, so the increment operator does not form part of a larger statement.
Problem
In programming, particularly in Java, what is the difference between: ``` int var = 0; var++; ``` and ``` int var = 0; ++var; ``` What repercussions would this have on a for loop? e.g. ``` for (int i = 0; i < 10; i++) {} for (int i = 0; i < 10; ++i) {} ```