Why does this Java code with “+ +” compile?

Question

I\'m curious why this simple program could be compiled by java using IntelliJ (Java 7).

public class Main {
    public static void main(String[] args)
    {
         


        

Answer 1

In this case, Java considers the + operator as a unary operator and hence the result is 10. Just try with the following code:

int e = + - 10; // result is -10
int e = - - 10; // result is 10