What is the difference between a += b and a =+ b , also a++ and ++a?

java

Solution

`a += b` is equivalent to `a = a + b`

`a = +b` is equivalent to `a = b`

`a++` and `++a` both increment `a` by 1. The difference is that `a++` returns the value of `a` before the increment whereas `++a` returns the value after the increment.

That is:

a = 10;
b = ++a; //a = 11, b = 11

a = 10;
b = a++; //a = 11, b = 10

Problem

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