Use of =+ operator in Java?

 

This question already has an answer here:

  • What is the difference between += and =+? 8 answers
  • What is the purpose of the =+ operator in Java? [duplicate] 2 answers 
    • int i =+ 2;

    It is positive 2(+2) assignment to variable i. It is more miningful or understandable if your write like -- int i = +2;

    One more example - 

    int i = 2;
i=+3;
System.out.println(i);

    It prints 3.

    + Unary plus operator; indicates positive value (numbers are positive without this, however)

    More example - http://docs.oracle.com/javase/tutorial/displayCode.html?code=http://docs.oracle.com/javase/tutorial/java/nutsandbolts/examples/UnaryDemo.java

    I believe what you mean by =+ is really +=.

    Your code is assigning the value of +2 (positive 2) to the integer.

    For example: 

    int x =+ 4;
x =+ 8;
Console.WriteLine(x.ToString());
Console.ReadLine();

    Will print "8", not 12. This is because you are assigning x to +4 and then +8.

    If you are asking about what += does, it is a shorthand to takes the initial variable and add to it. 

    x += 8

    is the same as 

    x = x + 8

    By changing the previous example form =+ to += give us: 

    int x = 4;
x += 8;
Console.WriteLine(x.ToString());
Console.ReadLine();

    Will print "12".

    Upon saying: 

    int i =+ 2;

    + acts as a unary operator.

    To elaborate, it sets i to a positive value 2 .

    EDIT: Your update says: 

    int i =- -2;

    produces 2. Why?

    In this case, it implies that i=-(-(2)) . Note that using a unary minus operator might produce unexpected results when the value is, say, Integer.MIN_VALUE .

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