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Arithmetic operator in java

I ran into unusual arithmetic operations and here is the code:

    int i = 9 + + 8 - - 11 + + 13 - - 14 + + 15;

    System.out.println(i);

It works without compilation error and gives a result of 70, I tried googling but couldn't find the correct explanation. I'm sorry, I'm new to Java.

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3 answers 


int i = 9 + + 8 - - 11 + + 13 - - 14 + + 15;

equivalent to

int i = 9 + (+8) - (-11) + (+13) - (-14) + (+15);


which is equivalent

int i = 9 + 8 + 11 + 13 + 14 + 15;

equal to 70

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9+ +8

equivalent 9+(+8)

and

8- -11

equivalent to 8-(-11)



therefore 9 + + 8 - - 11 + + 13 - - 14 + + 15

equivalent to9+(+8)-(-11)+(+13)-(-14)+(+15)

which is equivalent to 9+8+11+13+14+15

=70

+2


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It is actually a mathematical arithmetic operation, and the same applies to Java:

- - = +

+ + = +

int i = 9 + 8 + 11 + 13 + 14 + 15;

so what is it 70

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